diff --git a/src/task.c b/src/task.c
index 7f6e0e7..c60961f 100644
--- a/src/task.c
+++ b/src/task.c
@@ -68,7 +68,7 @@
 		task->qlist.p = NULL;
 	}
 
-	if (unlikely(task->wq)) {
+	if (unlikely(task->wq != NULL)) {
 		tree_delete(task->wq);
 		task->wq = NULL;
 	}