diff --git a/data_structures/reverse_a_linked_list.cpp b/data_structures/reverse_a_linked_list.cpp
index 2324cb645..806fd54fa 100644
--- a/data_structures/reverse_a_linked_list.cpp
+++ b/data_structures/reverse_a_linked_list.cpp
@@ -137,8 +137,9 @@ int list::last() {
             t = t->next;
         }
         return t->val;
-    } else
+    } else {
         return 0;
+    }
 }
 }  // namespace linked_list
 }  // namespace data_structures