diff --git a/contrib/win32/openssh/Win32-OpenSSH.sln b/contrib/win32/openssh/Win32-OpenSSH.sln
index 3f69841..f60058e 100644
--- a/contrib/win32/openssh/Win32-OpenSSH.sln
+++ b/contrib/win32/openssh/Win32-OpenSSH.sln
@@ -116,6 +116,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "win32compatUnittests", "win
 		{8660C2FE-9874-432D-B047-E042BB41DBE0} = {8660C2FE-9874-432D-B047-E042BB41DBE0}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "win32iocompat", "win32iocompat.vcxproj", "{0D02F0F0-013B-4EE3-906D-86517F3822C0}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x64 = Debug|x64
@@ -260,6 +262,14 @@ Global
 		{780CAFE4-4BC5-407B-B3A6-71C4114826A7}.Release|x64.Build.0 = Release|x64
 		{780CAFE4-4BC5-407B-B3A6-71C4114826A7}.Release|x86.ActiveCfg = Release|Win32
 		{780CAFE4-4BC5-407B-B3A6-71C4114826A7}.Release|x86.Build.0 = Release|Win32
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Debug|x64.ActiveCfg = Debug|x64
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Debug|x64.Build.0 = Debug|x64
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Debug|x86.ActiveCfg = Debug|Win32
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Debug|x86.Build.0 = Debug|Win32
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Release|x64.ActiveCfg = Release|x64
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Release|x64.Build.0 = Release|x64
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Release|x86.ActiveCfg = Release|Win32
+		{0D02F0F0-013B-4EE3-906D-86517F3822C0}.Release|x86.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/contrib/win32/openssh/win32compat.vcxproj b/contrib/win32/openssh/win32compat.vcxproj
index 86351cd..874ec42 100644
--- a/contrib/win32/openssh/win32compat.vcxproj
+++ b/contrib/win32/openssh/win32compat.vcxproj
@@ -152,10 +152,6 @@
     <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\pwd.c" />
     <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\sfds.c" />
     <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\socket.c" />
-    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\w32fd.c" />
-    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\signal.c" />
-    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\socketio.c" />
-    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\fileio.c" />
     <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\startupneeds.c" />
     <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\strcasecmp.c" />
     <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\stringhelp.c" />
@@ -182,7 +178,6 @@
     <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\lsalogon.h" />
     <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\lsastring.h" />
     <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\sfds.h" />
-    <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\w32fd.h" />
     <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\stringhelp.h" />
     <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\tncon.h" />
     <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\tnnet.h" />
diff --git a/contrib/win32/openssh/win32compatUnittests.vcxproj b/contrib/win32/openssh/win32compatUnittests.vcxproj
index 0dd0d0c..a499b59 100644
--- a/contrib/win32/openssh/win32compatUnittests.vcxproj
+++ b/contrib/win32/openssh/win32compatUnittests.vcxproj
@@ -113,7 +113,7 @@
       <SubSystem>Console</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalLibraryDirectories>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <AdditionalDependencies>win32compat.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>win32iocompat.lib;win32compat.lib;libssh.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
     <Manifest>
       <AdditionalManifestFiles>targetos.manifest</AdditionalManifestFiles>
@@ -126,7 +126,7 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>_WIN32_WINNT=0x501;WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>false</SDLCheck>
-      <AdditionalIncludeDirectories>$(OpenSSH-Src-Path)contrib\win32\win32compat\inc;</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(OpenSSH-Src-Path)contrib\win32\win32compat\inc</AdditionalIncludeDirectories>
       <CompileAs>CompileAsC</CompileAs>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
@@ -135,7 +135,7 @@
       <SubSystem>Console</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalLibraryDirectories>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <AdditionalDependencies>libssh.lib;win32compat.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>win32iocompat.lib;win32compat.lib;libssh.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
     <Manifest>
       <AdditionalManifestFiles>targetos.manifest</AdditionalManifestFiles>
@@ -159,7 +159,7 @@
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalLibraryDirectories>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <AdditionalDependencies>win32compat.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>win32iocompat.lib;win32compat.lib;libssh.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
     <Manifest>
       <AdditionalManifestFiles>targetos.manifest</AdditionalManifestFiles>
@@ -184,7 +184,7 @@
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalLibraryDirectories>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <AdditionalDependencies>win32compat.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>win32iocompat.lib;win32compat.lib;libssh.lib;mswsock.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
     <Manifest>
       <AdditionalManifestFiles>targetos.manifest</AdditionalManifestFiles>
diff --git a/contrib/win32/openssh/win32iocompat.vcxproj b/contrib/win32/openssh/win32iocompat.vcxproj
new file mode 100644
index 0000000..c753642
--- /dev/null
+++ b/contrib/win32/openssh/win32iocompat.vcxproj
@@ -0,0 +1,155 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="paths.targets" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{0D02F0F0-013B-4EE3-906D-86517F3822C0}</ProjectGuid>
+    <RootNamespace>win32iocompat</RootNamespace>
+    <Keyword>Win32Proj</Keyword>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>14.0.23107.0</_ProjectFileVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <OutDir>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration)\</OutDir>
+    <IntDir>$(Platform)\$(Configuration)\$(TargetName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <OutDir>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration)\</OutDir>
+    <IntDir>$(Platform)\$(Configuration)\$(TargetName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <OutDir>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration)\</OutDir>
+    <IntDir>$(Platform)\$(Configuration)\$(TargetName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <OutDir>$(OpenSSH-Lib-Path)$(Platform)\$(Configuration)\</OutDir>
+    <IntDir>$(Platform)\$(Configuration)\$(TargetName)\</IntDir>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>
+      </AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>USE_MSCNG;_WIN32_WINNT=0x501;WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MinimalRebuild>true</MinimalRebuild>
+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level1</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <SDLCheck>false</SDLCheck>
+      <ExceptionHandling>false</ExceptionHandling>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>
+      </AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>USE_MSCNG;_WIN32_WINNT=0x501;WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level1</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <SDLCheck>false</SDLCheck>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <AdditionalIncludeDirectories>
+      </AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;USE_MSCNG;_WIN32_WINNT=0x501;WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level1</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <SDLCheck>false</SDLCheck>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <AdditionalIncludeDirectories>
+      </AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;USE_MSCNG;_WIN32_WINNT=0x501;WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level1</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <SDLCheck>false</SDLCheck>
+      <Optimization>Disabled</Optimization>
+      <WholeProgramOptimization>false</WholeProgramOptimization>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\w32fd.c" />
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\signal.c" />
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\socketio.c" />
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\fileio.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\w32fd.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/contrib/win32/openssh/win32iocompat.vcxproj.filters b/contrib/win32/openssh/win32iocompat.vcxproj.filters
new file mode 100644
index 0000000..7cd9fcb
--- /dev/null
+++ b/contrib/win32/openssh/win32iocompat.vcxproj.filters
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\w32fd.c" />
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\signal.c" />
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\socketio.c" />
+    <ClCompile Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\fileio.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="$(OpenSSH-Src-Path)\contrib\win32\win32compat\w32fd.h" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/regress/unittests/win32compat/socket_tests.c b/regress/unittests/win32compat/socket_tests.c
index 1c905a4..2b3c30c 100644
--- a/regress/unittests/win32compat/socket_tests.c
+++ b/regress/unittests/win32compat/socket_tests.c
@@ -13,6 +13,9 @@
 #define BACKLOG 2  
 #define SMALL_RECV_BUF_SIZE 128
 
+/* remove this later once right header is included*/
+#define O_NONBLOCK  0x0004
+
 #pragma warning(disable:4267)
 
 int listen_fd, accept_fd, connect_fd, ret;