diff --git a/data_structures/queue/queue_using_stack/queue_using_stack.c b/data_structures/queue/queue_using_stack/queue_using_stack.c
index ebaaace4..10c3bc67 100644
--- a/data_structures/queue/queue_using_stack/queue_using_stack.c
+++ b/data_structures/queue/queue_using_stack/queue_using_stack.c
@@ -103,3 +103,5 @@ int main(){
 
     display();
 }
+
+/* sacheex 2023 */