diff --git a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
index fa56d855f80..2a5471be8f4 100644
--- a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
+++ b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
@@ -1372,6 +1372,7 @@ void TextToModelMerger::syncNode(ModelNode &modelNode,
                 }
 
                 syncSignalDeclarationProperty(modelProperty, signature, differenceHandler);
+                modelPropertyNames.remove(astName.toUtf8());
                 continue; // Done
             }