diff --git a/src/Mod/Assembly/App/AssemblyObject.cpp b/src/Mod/Assembly/App/AssemblyObject.cpp
index 07fc236247..f219bb751a 100644
--- a/src/Mod/Assembly/App/AssemblyObject.cpp
+++ b/src/Mod/Assembly/App/AssemblyObject.cpp
@@ -541,6 +541,7 @@ void AssemblyObject::recomputeJointPlacements(std::vector<App::DocumentObject*>
             Py::Tuple args(1);
             args.setItem(0, Py::asObject(joint->getPyObject()));
             Py::Callable(attr).apply(args);
+            joint->purgeTouched();
         }
     }
 }