diff --git a/ipykernel/log.py b/ipykernel/log.py
index 728623fc7..97789c378 100644
--- a/ipykernel/log.py
+++ b/ipykernel/log.py
@@ -4,7 +4,7 @@
 
 import warnings
 warnings.warn("ipykernel.log is deprecated. It has moved to ipyparallel.engine.log",
-    DeprecationWarning
+    DeprecationWarning,
     stacklevel=2
 )