diff --git a/include/CallConvention.h b/include/CallConvention.h
index 4c41633..b4648c8 100644
--- a/include/CallConvention.h
+++ b/include/CallConvention.h
@@ -1,6 +1,9 @@
 #pragma once
 #include "ast.h"
 
+#ifdef PASCAL
+#undef PASCAL
+#endif
 class QTextStream;
 
 struct CConv {