1 files changed, 1 insertions, 1 deletions

diff --git a/src/xfns.c b/src/xfns.c
index 0fc157baf85..5cc17d674a5 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -3018,7 +3018,7 @@ DEFUN ("x-display-grayscale-p", Fx_display_grayscale_p, Sx_display_grayscale_p,
 {
   check_x ();
 
-  return (x_screen_planes > 2
+  return (x_screen_planes > 1
           && (screen_visual->class == StaticGray
               || screen_visual->class == GrayScale));
 }