diff --git a/libavfilter/vf_fade.c b/libavfilter/vf_fade.c
index b3cccbde0b..4c2cd4b38a 100644
--- a/libavfilter/vf_fade.c
+++ b/libavfilter/vf_fade.c
@@ -114,7 +114,7 @@ static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
             }
         }
 
-        if (outpic->data[0] && outpic->data[1]) {
+        if (outpic->data[1] && outpic->data[2]) {
             /* chroma planes */
             for (plane = 1; plane < 3; plane++) {
                 for (i = 0; i < h; i++) {