diff --git a/fftools/ffmpeg_sched.c b/fftools/ffmpeg_sched.c
index c5ee6971f1..0d820acb8e 100644
--- a/fftools/ffmpeg_sched.c
+++ b/fftools/ffmpeg_sched.c
@@ -2654,7 +2654,7 @@ static int task_cleanup(Scheduler *sch, SchedulerNode node)
     case SCH_NODE_TYPE_DEC:         return dec_done   (sch, node.idx);
     case SCH_NODE_TYPE_ENC:         return enc_done   (sch, node.idx);
     case SCH_NODE_TYPE_FILTER_IN:   return filter_done(sch, node.idx);
-    default: av_assert0(0);
+    default: av_unreachable("Invalid node type?");
     }
 }