diff --git a/libavfilter/vf_transpose.c b/libavfilter/vf_transpose.c
index 1e1a5c4b89..3ff4cb4249 100644
--- a/libavfilter/vf_transpose.c
+++ b/libavfilter/vf_transpose.c
@@ -217,7 +217,7 @@ static int config_props_output(AVFilterLink *outlink)
 
     s->hsub = desc_in->log2_chroma_w;
     s->vsub = desc_in->log2_chroma_h;
-    s->planes = desc_in->nb_components;
+    s->planes = av_pix_fmt_count_planes(outlink->format);
 
     av_assert0(desc_in->nb_components == desc_out->nb_components);