diff --git a/src/vlib/node_funcs.h b/src/vlib/node_funcs.h
index 33bdc79..b33f496 100644
--- a/src/vlib/node_funcs.h
+++ b/src/vlib/node_funcs.h
@@ -1247,6 +1247,15 @@
 u32 vlib_process_create (vlib_main_t * vm, char *name,
 			 vlib_node_function_t * f, u32 log2_n_stack_bytes);
 
+always_inline int
+vlib_node_set_dispatch_wrapper (vlib_main_t *vm, vlib_node_function_t *fn)
+{
+  if (fn && vm->dispatch_wrapper_fn)
+    return 1;
+  vm->dispatch_wrapper_fn = fn;
+  return 0;
+}
+
 #endif /* included_vlib_node_funcs_h */
 
 /*