diff --git a/src/App/DocumentObject.cpp b/src/App/DocumentObject.cpp
index aedcc38abe..f92103c0b0 100644
--- a/src/App/DocumentObject.cpp
+++ b/src/App/DocumentObject.cpp
@@ -479,7 +479,8 @@ bool DocumentObject::isTouched() const
 
 void DocumentObject::Save (Base::Writer &writer) const
 {
-    writer.ObjectName = this->getNameInDocument();
+    if (this->getNameInDocument())
+        writer.ObjectName = this->getNameInDocument();
     App::ExtensionContainer::Save(writer);
 }