diff --git a/jmorecfg.h b/jmorecfg.h
index f244c26..1de9b7d 100644
--- a/jmorecfg.h
+++ b/jmorecfg.h
@@ -155,6 +155,10 @@ typedef unsigned int UINT16;
 typedef short INT16;
 #endif
 
+#if defined( __GNUWIN32__ ) || defined( __MINGW32__ ) || defined( __CYGWIN__ )
+#include <wx/msw/gccpriv.h>
+#endif
+
 /* INT32 must hold at least signed 32-bit values. */
 
 /* you may define INT32_DEFINED if it is already defined somewhere */
@@ -163,8 +167,10 @@ typedef short INT16;
 /* X11/xmd.h correctly defines INT32 */
 #define INT32_DEFINED
 #elif (_MSC_VER >= 1200) || (__BORLANDC__ >= 0x550) || \
+      wxCHECK_W32API_VERSION( 0, 5 ) || \
       ((defined(__MINGW32__) || defined(__CYGWIN__)) \
        && ((__GNUC__>2) || ((__GNUC__==2) && (__GNUC_MINOR__>=95))))
+
 /* INT32 is defined in windows.h  for these compilers */
 #define INT32_DEFINED
 #include <windows.h>