diff --git a/maint/scripts/run_autopep8.sh b/maint/scripts/run_autopep8.sh
index 5d85efd1..60dedb03 100755
--- a/maint/scripts/run_autopep8.sh
+++ b/maint/scripts/run_autopep8.sh
@@ -5,4 +5,5 @@
 # W602 is "deprecated form of raising exception", but the fix is incorrect
 # (and I'm not sure if the three-argument form of raise is really deprecated
 # in the first place)
-autopep8 --ignore=W602 -i tornado/*.py tornado/platform/*.py tornado/test/*.py
+# E501 is "line longer than 80 chars" but the automated fix is ugly.
+autopep8 --ignore=W602,E501 -i tornado/*.py tornado/platform/*.py tornado/test/*.py