diff --git a/cmd/arcstat/arcstat.py b/cmd/arcstat/arcstat.py
index 41bf61b73b..5a09128538 100755
--- a/cmd/arcstat/arcstat.py
+++ b/cmd/arcstat/arcstat.py
@@ -413,7 +413,7 @@ def calculate():
         v["l2bytes"] = d["l2_read_bytes"] / sint
 
 
-def sighandler(foo, bar):
+def sighandler():
     sys.exit(0)