Index: include/reactos/wine/port.h
===================================================================
--- include/reactos/wine/port.h	(revision 58975)
+++ include/reactos/wine/port.h	(working copy)
@@ -43,6 +43,7 @@
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif
+#include <intrin.h>
 
 
 /****************************************************************
@@ -345,13 +346,13 @@
 
 #endif  /* __i386___ && __GNUC__ */
 
-#if defined(_MSC_VER)
+#ifdef _WIN32
 __forceinline
 int
 ffs(int mask)
 {
     long index;
-    if (_BitScanForward(&index, mask) == 0) return 0;
+    if (_BitScanForward((unsigned long *)&index, mask) == 0) return 0;
     return index;
 }
 #endif