diff --git a/miscutils/less.c b/miscutils/less.c
index 223c2558d..26983f40d 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -1820,7 +1820,7 @@ int less_main(int argc, char **argv)
 	getopt32(argv, "EMmN~IF"
 		IF_FEATURE_LESS_TRUNCATE("S")
 		IF_FEATURE_LESS_RAW("R")
-		/*ignored:*/"s"
+		/*ignored:*/"sX"
 	);
 	argv += optind;
 	num_files = argc - optind;