diff --git a/src/osg/NodeCallback.cpp b/src/osg/NodeCallback.cpp
new file mode 100644
index 000000000..ed7c4a3b2
--- /dev/null
+++ b/src/osg/NodeCallback.cpp
@@ -0,0 +1,11 @@
+#include <osg/Node>
+#include <osg/NodeCallback>
+#include <osg/NodeVisitor>
+
+using namespace osg;
+
+void NodeCallback::traverse(Node* node,NodeVisitor* nv)
+{
+    if (_nestedCallback.valid()) (*_nestedCallback)(node,nv);
+    else nv->traverse(*node);
+}