diff --git a/src/plugins/qt4projectmanager/qtversionmanager.h b/src/plugins/qt4projectmanager/qtversionmanager.h
index 5cf59f46996..92c90ab6ef9 100644
--- a/src/plugins/qt4projectmanager/qtversionmanager.h
+++ b/src/plugins/qt4projectmanager/qtversionmanager.h
@@ -47,7 +47,6 @@ namespace Qt4ProjectManager {
 namespace Internal {
 class QtOptionsPageWidget;
 class QtOptionsPage;
-class Qt4ProjectManagerPlugin;
 }
 
 class QtVersion