diff --git a/main/http_status_codes.h b/main/http_status_codes.h
index 4567fb4f3d5..987f2cf4c8b 100644
--- a/main/http_status_codes.h
+++ b/main/http_status_codes.h
@@ -66,6 +66,7 @@ static http_response_status_code_pair http_status_map[] = {
 	{ 428, "Precondition Required" },
 	{ 429, "Too Many Requests" },
 	{ 431, "Request Header Fields Too Large" },
+	{ 451, "Unavailable For Legal Reasons"},
 	{ 500, "Internal Server Error" },
 	{ 501, "Not Implemented" },
 	{ 502, "Bad Gateway" },