Index: include/host/typedefs.h
===================================================================
--- include/host/typedefs.h	(revision 58975)
+++ include/host/typedefs.h	(working copy)
@@ -33,7 +33,10 @@
 #define DPRINT1 printf
 
 #define NTAPI
+
+#ifndef WINAPI
 #define WINAPI
+#endif
 
 #define IN
 #define OUT
Index: include/reactos/wine/port.h
===================================================================
--- include/reactos/wine/port.h	(revision 58975)
+++ include/reactos/wine/port.h	(working copy)
@@ -44,7 +44,6 @@
 # include <unistd.h>
 #endif
 
-
 /****************************************************************
  * Type definitions
  */
@@ -345,13 +344,14 @@
 
 #endif  /* __i386___ && __GNUC__ */
 
-#if defined(_MSC_VER)
+#if defined(__MINGW32__) || defined(_MSC_VER)
+#include <intrin.h>
 __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