diff --git a/src/libs/modelinglib/qmt/diagram_scene/items/classitem.h b/src/libs/modelinglib/qmt/diagram_scene/items/classitem.h
index fedc8e7159aa4c2cdfe5f057bc8dfc0f589f57ec..1e0df2a451aa581aa62e716bc7161c34451b69cc 100644
--- a/src/libs/modelinglib/qmt/diagram_scene/items/classitem.h
+++ b/src/libs/modelinglib/qmt/diagram_scene/items/classitem.h
@@ -49,6 +49,8 @@ class Style;
 
 class ClassItem : public ObjectItem, public IRelationable
 {
+    Q_DECLARE_TR_FUNCTIONS(qmt::ClassItem)
+
 public:
     ClassItem(DClass *klass, DiagramSceneModel *diagramSceneModel, QGraphicsItem *parent = 0);
     ~ClassItem() override;
diff --git a/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.h b/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.h
index 75ae11f0a597eb7c0449f7e27ea2bbc01c183865..6d8901b4c866d64d9ed846c3c910ab318033075a 100644
--- a/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.h
+++ b/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.h
@@ -70,7 +70,7 @@ class ObjectItem :
         public IAlignable,
         public IEditable
 {
-    Q_DECLARE_TR_FUNCTIONS(ObjectItem)
+    Q_DECLARE_TR_FUNCTIONS(qmt::ObjectItem)
 
 protected:
     enum ResizeFlags {