diff --git a/findutils/grep.c b/findutils/grep.c
index 88de0d4..3e8ea92 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -704,10 +704,15 @@
 	/* do normal option parsing */
 #if ENABLE_FEATURE_GREP_CONTEXT
 	/* -H unsets -h; -C unsets -A,-B */
-	opts = getopt32(argv,
-		"^" OPTSTR_GREP "\0" "H-h:C-AB",
+	opts = getopt32long(argv, "^"
+		OPTSTR_GREP
+			"\0"
+			"H-h:C-AB",
+		"color\0" Optional_argument "\xff",
 		&pattern_head, &fopt, &max_matches,
-		&lines_after, &lines_before, &Copt);
+		&lines_after, &lines_before, &Copt
+		, NULL
+	);
 
 	if (opts & OPT_C) {
 		/* -C unsets prev -A and -B, but following -A or -B