diff --git a/p4app/controller.py b/p4app/controller.py
index 9b69fad..309973b 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -254,7 +254,7 @@ class L2Controller(object):
 
             shift_by = (bits/8) -1
 
-            log.debug("Len of cpu= {}, {}, shift={}".format(bits, bits/8, shift_by)
+            log.debug("Len of cpu= {}, {}, shift={}".format(bits, bits/8, shift_by))
 
             ether_orig = Ether(src=packet.src, dst=packet.dst, type=0x86dd)
             orig_packet = ether_orig / IPv6(packet.load[shift_by:])