diff --git a/cv4/list_ops.c b/cv4/list_ops.c
index 8d7a0f8..7cc74dc 100644
--- a/cv4/list_ops.c
+++ b/cv4/list_ops.c
@@ -9,7 +9,7 @@ list_t *new_list(size_t length, list_element_t elements[]){
 
 }
 
-/*list_t *append_list(list_t *list1, list_t *list2){
+list_t *append_list(list_t *list1, list_t *list2){
   return NULL;
 
 }
@@ -52,4 +52,4 @@ list_t *reverse_list(list_t *list){
 
 void delete_list(list_t *list){
 
-}*/
\ No newline at end of file
+}
\ No newline at end of file