diff --git a/tools/stats/gsummary.py b/tools/stats/gsummary.py
index 5acb74458bd..13865a7b411 100755
--- a/tools/stats/gsummary.py
+++ b/tools/stats/gsummary.py
@@ -13,7 +13,7 @@ except ImportError:
 
 def stop_err(msg):
     sys.stderr.write(msg)
-    sys.exit()
+    sys.exit(1)
 
 
 def S3_METHODS(all="key"):