diff --git a/qtinterface/tqt.h b/qtinterface/tqt.h
index 43e3b7f..d3098bc 100644
--- a/qtinterface/tqt.h
+++ b/qtinterface/tqt.h
@@ -768,6 +768,9 @@ Boston, MA 02110-1301, USA.
 #define static_TQUType_ptr	static_QUType_ptr
 #define static_TQUType_bool	static_QUType_bool
 
+#define TQ_EXTERN_C		Q_EXTERN_C
+#define TQ_EXPORT_PLUGIN	Q_EXPORT_PLUGIN
+
 #define tqt_mo_access access
 
 // BEGIN BLOCK ONE