diff --git a/filesystem/VFileSystem009.cpp b/filesystem/VFileSystem009.cpp
index adac91bc..ad2a72c0 100644
--- a/filesystem/VFileSystem009.cpp
+++ b/filesystem/VFileSystem009.cpp
@@ -219,8 +219,8 @@ public:
 
 	void FileTimeToString( char *p, int size, long int time ) override
 	{
-		char *buf = ctime( &time );
-
+		time_t curtime = time;
+		char *buf = ctime( &curtime );
 		Q_strncpy( p, buf, size );
 	}
 
diff --git a/filesystem/filesystem.c b/filesystem/filesystem.c
index 55298c6c..ebe9c87e 100644
--- a/filesystem/filesystem.c
+++ b/filesystem/filesystem.c
@@ -1313,7 +1313,7 @@ static qboolean FS_FindLibrary( const char *dllname, qboolean directpath, fs_dll
 #if XASH_WIN32 && XASH_X86 // a1ba: custom loader is non-portable (I just don't want to touch it)
 			Con_Printf( S_WARN "%s: loading libraries from packs is deprecated "
 				"and will be removed in the future\n", __FUNCTION__ );
-			*custom_loader = true;
+			dllInfo->custom_loader = true;
 #else
 			Con_Printf( S_WARN "%s: loading libraries from packs is unsupported on "
 				"this platform\n", __FUNCTION__ );
@@ -1390,8 +1390,9 @@ qboolean FS_InitStdio( qboolean caseinsensitive, const char *rootdir, const char
 	int		i;
 
 	FS_InitMemory();
-
+#if !XASH_WIN32
 	fs_caseinsensitive = caseinsensitive;
+#endif
 
 	Q_strncpy( fs_rootdir, rootdir, sizeof( fs_rootdir ));
 	Q_strncpy( fs_gamedir, gamedir, sizeof( fs_gamedir ));
@@ -1979,8 +1980,13 @@ int FS_Flush( file_t *file )
 	FS_Purge( file );
 
 	// sync
+#if XASH_POSIX
 	if( fsync( file->handle ) < 0 )
 		return EOF;
+#else
+	if( fflush( file->handle ) < 0 )
+		return EOF;
+#endif
 
 	return 0;
 }
diff --git a/filesystem/pak.c b/filesystem/pak.c
index 7dac5b8f..c0a8a911 100644
--- a/filesystem/pak.c
+++ b/filesystem/pak.c
@@ -14,10 +14,13 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 */
 
+#include "build.h"
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#if XASH_POSIX
 #include <unistd.h>
+#endif
 #include <errno.h>
 #include <stddef.h>
 #include "port.h"
diff --git a/filesystem/wad.c b/filesystem/wad.c
index 9cbfa886..f741ff68 100644
--- a/filesystem/wad.c
+++ b/filesystem/wad.c
@@ -17,7 +17,9 @@ GNU General Public License for more details.
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#if XASH_POSIX
 #include <unistd.h>
+#endif
 #include <errno.h>
 #include <stddef.h>
 #include "port.h"
diff --git a/filesystem/zip.c b/filesystem/zip.c
index dcad291b..838928e0 100644
--- a/filesystem/zip.c
+++ b/filesystem/zip.c
@@ -17,7 +17,9 @@ GNU General Public License for more details.
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#if XASH_POSIX
 #include <unistd.h>
+#endif
 #include <errno.h>
 #include <stddef.h>
 #include STDINT_H