diff --git a/contrib/win32/win32compat/fileio.c b/contrib/win32/win32compat/fileio.c
index 6ab187b23..de9fbe874 100644
--- a/contrib/win32/win32compat/fileio.c
+++ b/contrib/win32/win32compat/fileio.c
@@ -343,7 +343,8 @@ createFile_flags_setup(int flags, u_short mode, struct createFile_flags* cf_flag
 	switch (rwflags) {
 	case O_RDONLY:
 		cf_flags->dwDesiredAccess = GENERIC_READ;
-		cf_flags->dwShareMode = FILE_SHARE_READ;
+		/* refer to https://msdn.microsoft.com/en-us/library/windows/desktop/aa363874(v=vs.85).aspx */
+		cf_flags->dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
 		break;
 	case O_WRONLY:
 		cf_flags->dwDesiredAccess = GENERIC_WRITE;
diff --git a/contrib/win32/win32compat/w32log.c b/contrib/win32/win32compat/w32log.c
index fe812237c..3483bea23 100644
--- a/contrib/win32/win32compat/w32log.c
+++ b/contrib/win32/win32compat/w32log.c
@@ -98,7 +98,7 @@ syslog(int priority, const char *format, const char *formatBuffer)
 		return;
 
 	GetLocalTime(&st);
-	r = snprintf(msgbufTimestamp, sizeof(msgbufTimestamp), "%d %02d:%02d:%02d %03d %s\n",
+	r = snprintf(msgbufTimestamp, sizeof(msgbufTimestamp), "%d %02d:%02d:%02d:%03d %s\n",
 		GetCurrentProcessId(), st.wHour, st.wMinute, st.wSecond,
 		st.wMilliseconds, formatBuffer);
 	msgbufTimestamp[sizeof(msgbufTimestamp) - 1] = '\0';