diff --git a/libavfilter/vf_hqdn3d.c b/libavfilter/vf_hqdn3d.c
index 80495aaa27..3b46b6d4f8 100644
--- a/libavfilter/vf_hqdn3d.c
+++ b/libavfilter/vf_hqdn3d.c
@@ -254,6 +254,7 @@ static int config_input(AVFilterLink *inlink)
     int i, depth;
 
     uninit(inlink->dst);
+    s->width = 0;
 
     s->hsub  = desc->log2_chroma_w;
     s->vsub  = desc->log2_chroma_h;