diff --git a/p4app/controller.py b/p4app/controller.py
index 0a9b307..27dff5e 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -251,6 +251,8 @@ class L2Controller(object):
                              seq=pkg[ICMPv6EchoRequest].seq,
                              data=pkg[ICMPv6EchoRequest].data)
         i2.cksum = None
+        answer = e / i / i2
+
         self.send_pkg(answer)