diff --git a/libavfilter/vf_paletteuse.c b/libavfilter/vf_paletteuse.c
index e8dde572cd..b25c6a9eac 100644
--- a/libavfilter/vf_paletteuse.c
+++ b/libavfilter/vf_paletteuse.c
@@ -444,7 +444,7 @@ static av_always_inline int set_frame(PaletteUseContext *s, AVFrame *out, AVFram
                 if (down) {
                     if (left2)      src[  src_linesize + x - 2] = dither_color(src[  src_linesize + x - 2], er, eg, eb, 1, 4);
                     if (left)       src[  src_linesize + x - 1] = dither_color(src[  src_linesize + x - 1], er, eg, eb, 2, 4);
-                                    src[  src_linesize + x    ] = dither_color(src[  src_linesize + x    ], er, eg, eb, 3, 4);
+                    if (1)          src[  src_linesize + x    ] = dither_color(src[  src_linesize + x    ], er, eg, eb, 3, 4);
                     if (right)      src[  src_linesize + x + 1] = dither_color(src[  src_linesize + x + 1], er, eg, eb, 2, 4);
                     if (right2)     src[  src_linesize + x + 2] = dither_color(src[  src_linesize + x + 2], er, eg, eb, 1, 4);
                 }