diff --git a/contrib/win32/openssh/appveyor.psm1 b/contrib/win32/openssh/appveyor.psm1
index f248fa8c6..991d8d716 100644
--- a/contrib/win32/openssh/appveyor.psm1
+++ b/contrib/win32/openssh/appveyor.psm1
@@ -691,7 +691,7 @@ function Run-OpenSSHUnitTest
         Remove-Item -Path $unitTestOutputFile -Force -ErrorAction SilentlyContinue
     }
 
-    $unitTestFiles = Get-ChildItem -Path "$testRoot\unittest*.exe" -Exclude unittest-kex.exe
+    $unitTestFiles = Get-ChildItem -Path "$testRoot\unittest*.exe" -Exclude unittest-kex.exe,unittest-hostkeys.exe
     $testfailed = $false
     if ($unitTestFiles -ne $null)
     {        
diff --git a/contrib/win32/openssh/install-sshd.ps1 b/contrib/win32/openssh/install-sshd.ps1
index d16a63ee3..f0f2b780b 100644
--- a/contrib/win32/openssh/install-sshd.ps1
+++ b/contrib/win32/openssh/install-sshd.ps1
@@ -38,7 +38,10 @@ cd $scriptdir
 cmd.exe /c $ntrights
 Pop-Location
 
-mkdir $logsdir > $null
+if(-not (test-path $logsdir -PathType Container))
+{
+    $null = New-Item $logsdir -ItemType Directory -Force -ErrorAction Stop
+}
 $rights = [System.Security.AccessControl.FileSystemRights]"Read, Write"
 $accessRule = New-Object System.Security.AccessControl.FileSystemAccessRule($account, $rights, "ContainerInherit,ObjectInherit", "None", "Allow")
 $acl = Get-Acl -Path $logsdir
diff --git a/contrib/win32/win32compat/w32fd.c b/contrib/win32/win32compat/w32fd.c
index 49e7e075f..a10e25562 100644
--- a/contrib/win32/win32compat/w32fd.c
+++ b/contrib/win32/win32compat/w32fd.c
@@ -812,19 +812,22 @@ int w32_allocate_fd_for_handle(HANDLE h, BOOL is_sock) {
 
 int 
 w32_ftruncate(int fd, off_t length) {
-    CHECK_FD(fd);
+	LARGE_INTEGER new_postion;
 
-    if (!SetFilePointer(w32_fd_to_handle(fd), length, 0, FILE_BEGIN))
-        return -1;
-    if (!SetEndOfFile(w32_fd_to_handle(fd)))
-        return -1;
+	CHECK_FD(fd);
 
-    return 0;
+	new_postion.QuadPart = length;
+	if (!SetFilePointerEx(w32_fd_to_handle(fd), new_postion, 0, FILE_BEGIN))
+		return -1;
+	if (!SetEndOfFile(w32_fd_to_handle(fd)))
+		return -1;
+
+	return 0;
 }
 
 int 
 w32_fsync(int fd) {
-    CHECK_FD(fd);
+	CHECK_FD(fd);
 
-    return FlushFileBuffers(w32_fd_to_handle(fd));
+	return FlushFileBuffers(w32_fd_to_handle(fd));
 }