diff --git a/common/port.h b/common/port.h
index 183f1fe7..9b6317ce 100644
--- a/common/port.h
+++ b/common/port.h
@@ -137,6 +137,7 @@ GNU General Public License for more details.
 	#define HAVE_DUP
 
 #endif //WIN32
+
 #ifndef XASH_LOW_MEMORY
 #define XASH_LOW_MEMORY 0
 #endif
diff --git a/common/xash3d_types.h b/common/xash3d_types.h
index e1d1a0ae..809da0ad 100644
--- a/common/xash3d_types.h
+++ b/common/xash3d_types.h
@@ -117,6 +117,11 @@ typedef struct file_s	file_t;		// normal file
 typedef struct wfile_s	wfile_t;		// wad file
 typedef struct stream_s	stream_t;		// sound stream for background music playing
 typedef off_t fs_offset_t;
+#if XASH_WIN32
+typedef int fs_size_t; // return type of _read, _write funcs
+#else /* !XASH_WIN32 */
+typedef ssize_t fs_size_t;
+#endif /* !XASH_WIN32 */
 
 typedef struct dllfunc_s
 {
diff --git a/engine/common/filesystem.c b/engine/common/filesystem.c
index 51e03f04..ff1139c3 100644
--- a/engine/common/filesystem.c
+++ b/engine/common/filesystem.c
@@ -606,7 +606,7 @@ pack_t *FS_LoadPackPAK( const char *packfile, int *error )
 	int         i, numpackfiles;
 	pack_t      *pack;
 	dpackfile_t *info;
-	ssize_t     c;
+	fs_size_t     c;
 
 	packhandle = open( packfile, O_RDONLY|O_BINARY );
 
@@ -722,7 +722,7 @@ static zip_t *FS_LoadZip( const char *zipfile, int *error )
 	zipfile_t	  *info = NULL;
 	char		  filename_buffer[MAX_SYSPATH];
 	zip_t         *zip = (zip_t *)Mem_Calloc( fs_mempool, sizeof( *zip ));
-	ssize_t       c;
+	fs_size_t       c;
 
 	zip->handle = open( zipfile, O_RDONLY|O_BINARY );