diff --git a/p4app/controller.py b/p4app/controller.py
index 47a4fcb..94955d9 100755
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -261,7 +261,7 @@ class L2Controller(object):
 
         log.info("NAT64 map: ({} -> {} => {}), ({} -> {} -> {} (only /24)))".format(
             v6_src, v6_dst, v4_dst,
-            v4_src, v4_dst, v6_src)
+            v4_src, v4_dst, v6_src))
 
 #                                  [str(v6_src)
         self.controller.table_add("nat64", "nat64_static",