diff --git a/src/plugins/qt4projectmanager/qt4nodes.h b/src/plugins/qt4projectmanager/qt4nodes.h
index f1240e7cdda..fee79ea4ee2 100644
--- a/src/plugins/qt4projectmanager/qt4nodes.h
+++ b/src/plugins/qt4projectmanager/qt4nodes.h
@@ -104,7 +104,6 @@ enum Qt4Variable {
 
 class Qt4PriFileNode;
 class Qt4ProFileNode;
-struct InternalNode;
 
 // Implements ProjectNode for qt4 pro files
 class Qt4PriFileNode : public ProjectExplorer::ProjectNode
@@ -177,7 +176,7 @@ private:
     // managed by Qt4ProFileNode
     friend class Qt4ProFileNode;
     // internal temporary subtree representation
-    friend class InternalNode;
+    friend struct InternalNode;
 };
 
 // Implements ProjectNode for qt4 pro files