diff --git a/tests/mgbench/compare_results.py b/tests/mgbench/compare_results.py
index 0762fd605..9cba3f7fa 100755
--- a/tests/mgbench/compare_results.py
+++ b/tests/mgbench/compare_results.py
@@ -335,7 +335,7 @@ if __name__ == "__main__":
                 continue
             else:
                 cleaned.append(field)
-    fields = cleaned
+        fields = cleaned
 
     if args.difference_threshold > 0.01:
         for field in fields: