diff --git a/lib/libwebsockets.h b/lib/libwebsockets.h
index 71b6a65a..e6cc2a05 100644
--- a/lib/libwebsockets.h
+++ b/lib/libwebsockets.h
@@ -145,6 +145,9 @@ LWS_VISIBLE LWS_EXTERN void lwsl_hexdump(void *buf, size_t len);
 
 #define LWS_FEATURE_SERVE_HTTP_FILE_HAS_OTHER_HEADERS_ARG
 
+    /* the struct libwebsocket_protocols has the id field present */
+#define LWS_FEATURE_PROTOCOLS_HAS_ID_FIELD
+
 
 enum libwebsocket_context_options {
 	LWS_SERVER_OPTION_REQUIRE_VALID_OPENSSL_CLIENT_CERT = 2,