diff --git a/src/util/top_sort.h b/src/util/top_sort.h
index f529d8a44..a743ee78f 100644
--- a/src/util/top_sort.h
+++ b/src/util/top_sort.h
@@ -69,7 +69,7 @@ class top_sort {
                 } 
                 while (s_f != f);
                 m_stack_P.pop_back();
-        }
+            }
         }
     }