diff --git a/libavfilter/vf_untile.c b/libavfilter/vf_untile.c
index 5d7709d68c..c8dafd1e60 100644
--- a/libavfilter/vf_untile.c
+++ b/libavfilter/vf_untile.c
@@ -134,8 +134,8 @@ static int activate(AVFilterContext *ctx)
         if (!(s->desc->flags & AV_PIX_FMT_FLAG_PAL)) {
             for (i = 1; i < 3; i ++) {
                 if (out->data[i]) {
-                    out->data[i] += (y >> s->desc->log2_chroma_w) * out->linesize[i];
-                    out->data[i] += (x >> s->desc->log2_chroma_h) * s->max_step[i];
+                    out->data[i] += (y >> s->desc->log2_chroma_h) * out->linesize[i];
+                    out->data[i] += (x >> s->desc->log2_chroma_w) * s->max_step[i];
                 }
             }
         }