diff --git a/cv4/list_ops.c b/cv4/list_ops.c
index b4a9a48..d7e7a74 100644
--- a/cv4/list_ops.c
+++ b/cv4/list_ops.c
@@ -28,14 +28,13 @@ list_t *append_list(list_t *list1, list_t *list2)
 
 list_t *filter_list(list_t *list, bool (*predicate)(list_element_t)) {
    list_element_t filter[list->length];
-   int counter = 0;
+   size_t filter_length = 0;
    for(size_t i = 0; i < list->length;i++){
      if(predicate(list->elements[i])){
-       filter[counter] = list->elements[i];
-       counter++;
+       filter[filter_length++] = list->elements[i];
    	}
    }
-   list_t *result = malloc(list->length);
+   list_t *result = new_list(filter_length,filter);
     if (result == NULL) {
         return NULL; 
     }