diff --git a/src/App/PropertyLinks.cpp b/src/App/PropertyLinks.cpp
index 3794bc8615..f80aff6f6f 100644
--- a/src/App/PropertyLinks.cpp
+++ b/src/App/PropertyLinks.cpp
@@ -44,10 +44,6 @@ using namespace App;
 using namespace Base;
 using namespace std;
 
-
-/// helper function for DAG back link handling
-void _maintainBackLink(DocumentObject *me, DocumentObject *oldObj, DocumentObject *newObj);
-
 //**************************************************************************
 //**************************************************************************
 // PropertyLink