diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 76431798cd..21b37ceeb8 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -691,8 +691,7 @@ const char *sws_format_name(enum PixelFormat format);
      (PIX_FMT_PLANAR | PIX_FMT_RGB)) == (PIX_FMT_PLANAR | PIX_FMT_RGB))
 
 #define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL)       || \
-                   (av_pix_fmt_descriptors[x].flags & PIX_FMT_PSEUDOPAL) || \
-                   (x) == PIX_FMT_Y400A)
+                   (av_pix_fmt_descriptors[x].flags & PIX_FMT_PSEUDOPAL))
 
 extern const uint64_t ff_dither4[2];
 extern const uint64_t ff_dither8[2];