diff --git a/queue.c b/queue.c
index dcd92d358..5841cb6fb 100644
--- a/queue.c
+++ b/queue.c
@@ -111,6 +111,7 @@ bool q_delete_mid(struct list_head *head)
     while (back != forward && back->prev != forward) {
         forward = forward->next;
         back = back->prev;
+        back = back->prev;
     }
     list_del(forward);
     element_t *node = list_entry(forward, element_t, list);