diff --git a/sc2/src/msvc++/UrQuanMasters.dsp b/sc2/src/msvc++/UrQuanMasters.dsp
index 77f9503ac..46da5eba8 100644
--- a/sc2/src/msvc++/UrQuanMasters.dsp
+++ b/sc2/src/msvc++/UrQuanMasters.dsp
@@ -3517,6 +3517,10 @@ SOURCE=..\sc2code\misc.c
 # End Source File
 # Begin Source File
 
+SOURCE=..\sc2code\mouse_err.c
+# End Source File
+# Begin Source File
+
 SOURCE=..\sc2code\nameref.h
 # End Source File
 # Begin Source File
diff --git a/sc2/src/port.c b/sc2/src/port.c
index 857ec1c61..f07f432a9 100644
--- a/sc2/src/port.c
+++ b/sc2/src/port.c
@@ -20,14 +20,15 @@
  * Created by Serge van den Boom
  */
 
+#include "port.h"
+
 #include <ctype.h>
-#include "errno.h"
+#include <errno.h>
 #include <stdlib.h>
 #include <string.h>
-#ifndef HAVE_READDIR_R
+#if !defined (_MSC_VER) && !defined (HAVE_READDIR_R)
 #	include <dirent.h>
 #endif
-#include "port.h"
 
 #ifndef HAVE_STRUPR
 char *
@@ -82,7 +83,7 @@ setenv (const char *name, const char *value, int overwrite)
 }
 #endif
 
-#ifndef HAVE_READDIR_R
+#if !defined (_MSC_VER) && !defined (HAVE_READDIR_R)
 // NB. This function calls readdir() directly, and as such has the same
 //     reentrance issues as that function. For the purposes of UQM it will
 //     do though.