diff --git a/user/usys.py b/user/usys.py
index 45dea8f..677c5b8 100755
--- a/user/usys.py
+++ b/user/usys.py
@@ -60,7 +60,9 @@ with open("kernel/syscall.h", "r") as sfile:
         missing_in_header_calls = calls - header_calls
 
         if missing_in_calls:
-            print("#These items are in header_calls but not in calls:", missing_in_calls)
+            print(
+                "#These items are in header_calls but not in calls:", missing_in_calls
+            )
         if missing_in_header_calls:
             print(
                 "#These items are in calls but not in header_calls:",