diff --git a/du6/list_ops.c b/du6/list_ops.c
index 3738320..382d189 100644
--- a/du6/list_ops.c
+++ b/du6/list_ops.c
@@ -4,7 +4,7 @@
 
 list_t *new_list(size_t length, list_element_t elements[]) {
     list_t *list = malloc(sizeof(list_t) + sizeof(list_element_t) * length);
-    if (!x) return NULL;
+    if (!list) return NULL;
 
     list->length = length;
     for (size_t i = 0; i < length; ++i) {