diff --git a/harbour/source/vm/mainwin.c b/harbour/source/vm/mainwin.c
index b0f12c0a73..2f00a51c44 100644
--- a/harbour/source/vm/mainwin.c
+++ b/harbour/source/vm/mainwin.c
@@ -57,6 +57,12 @@
 
 #if defined(HB_OS_WIN_32)
 
+#if defined(_MSC_VER)
+extern "C" {
+   LONG WINAPI hb_UnhandledExceptionFilter( struct _EXCEPTION_POINTERS * ExceptionInfo );
+};
+#endif
+
 #define MAX_ARGS 128
 
 static int    s_argc = 0;
@@ -73,7 +79,9 @@ int WINAPI WinMain( HINSTANCE hInstance,      /* handle to current instance */
 
    #ifdef HB_INCLUDE_WINEXCHANDLER
    {
-      LONG WINAPI hb_UnhandledExceptionFilter( struct _EXCEPTION_POINTERS * ExceptionInfo );
+      #if ! defined(_MSC_VER)
+         LONG WINAPI hb_UnhandledExceptionFilter( struct _EXCEPTION_POINTERS * ExceptionInfo );
+      #endif
       LPTOP_LEVEL_EXCEPTION_FILTER ef = SetUnhandledExceptionFilter( hb_UnhandledExceptionFilter );
       HB_SYMBOL_UNUSED( ef );
    }