diff --git a/firmware/config/boards/hellen/hellen128/prepend.txt b/firmware/config/boards/hellen/hellen128/prepend.txt
index 66045a7623..7b67b596ba 100644
--- a/firmware/config/boards/hellen/hellen128/prepend.txt
+++ b/firmware/config/boards/hellen/hellen128/prepend.txt
@@ -1,3 +1,5 @@
+#define MAIN_HELP_URL "https://rusefi.com/s/hellen128merc"
+
 #define ts_show_hip9011 false
 #define ts_show_cj125 false