diff --git a/p4app/controller.py b/p4app/controller.py
index ceb2801..56aa475 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -169,7 +169,7 @@ class L2Controller(object):
     def recv_msg_cpu(self, pkg):
         packet = Ether(str(pkg))
 
-        debug_print_pkg(pkg)
+        self.debug_print_pkg(pkg)
 
         if packet.type == 0x800:
             pass