diff --git a/designer/qscintillaplugin.cpp b/designer/qscintillaplugin.cpp
index f93b61d..b0523bb 100644
--- a/designer/qscintillaplugin.cpp
+++ b/designer/qscintillaplugin.cpp
@@ -1,7 +1,7 @@
 // This implements the TQScintilla plugin for TQt Designer.
 
 
-#include <qwidgetplugin.h>
+#include <tqwidgetplugin.h>
 
 #include "../qt/qextscintilla.h"