diff --git a/src/syntax.c b/src/syntax.c
index d7c482d..8444db3 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -7350,10 +7350,12 @@
 	    else
 		color = color_numbers_8[idx];
 	}
+#ifdef FEAT_TERMRESPONSE
 	if (t_colors >= 256 && color == 15 && is_mac_terminal)
 	    /* Terminal.app has a bug: 15 is light grey. Use white
 	     * from the color cube instead. */
 	    color = 231;
+#endif
     }
     return color;
 }