diff --git a/include/osg/Node b/include/osg/Node
index ec7ef4878..08c6cd254 100644
--- a/include/osg/Node
+++ b/include/osg/Node
@@ -223,8 +223,9 @@ class OSG_EXPORT Node : public Object
             if (nc != NULL && _updateCallback.valid()) {
                 if (_updateCallback == nc)
                 {
-                    setUpdateCallback(nc->getNestedCallback());        // replace the callback by the nested one
+                    ref_ptr<osg::Callback> new_nested_callback = nc->getNestedCallback();
                     nc->setNestedCallback(0);
+                    setUpdateCallback(new_nested_callback.get());
                 }
                 else _updateCallback->removeNestedCallback(nc);
             }
@@ -257,8 +258,9 @@ class OSG_EXPORT Node : public Object
             if (nc != NULL && _eventCallback.valid()) {
                 if (_eventCallback == nc)
                 {
-                    setEventCallback(nc->getNestedCallback());        // replace the callback by the nested one
+                    ref_ptr<osg::Callback> new_nested_callback = nc->getNestedCallback();
                     nc->setNestedCallback(0);
+                    setEventCallback(new_nested_callback.get()); // replace the callback by the nested one
                 }
                 else _eventCallback->removeNestedCallback(nc);
             }
@@ -291,8 +293,9 @@ class OSG_EXPORT Node : public Object
             if (nc != NULL && _cullCallback.valid()) {
                 if (_cullCallback == nc)
                 {
-                    setCullCallback(nc->getNestedCallback());        // replace the callback by the nested one
+                    ref_ptr<osg::Callback> new_nested_callback = nc->getNestedCallback();
                     nc->setNestedCallback(0);
+                    setCullCallback(new_nested_callback.get()); // replace the callback by the nested one
                 }
                 else _cullCallback->removeNestedCallback(nc);
             }