diff --git a/src/objective-c/change-comments.py b/src/objective-c/change-comments.py
index c47966b0c4ed2906ed2b78cf7150a56c6bbf9502..9aa0e0c9f5a196ff66f0269a907528d2a2244d43 100755
--- a/src/objective-c/change-comments.py
+++ b/src/objective-c/change-comments.py
@@ -36,7 +36,7 @@ import sys
 
 if len(sys.argv) < 2:
   print("Please provide at least one source file name as argument.")
-  quit()
+  sys.exit()
 
 for file_name in sys.argv[1:]: