diff --git a/loader/Project/Model/Src/prj_main.h b/loader/Project/Model/Src/prj_main.h
index 4e91f0494..dfd0fb3ad 100755
--- a/loader/Project/Model/Src/prj_main.h
+++ b/loader/Project/Model/Src/prj_main.h
@@ -93,7 +93,8 @@
 
 #define MODEL_68CS 0
 #define MODEL_S530 1
+#define MODEL_S550 2
 
-#define MODEL MODEL_S530 /* 1. MODEL_68CS 2. MODEL_S530 */
+#define MODEL MODEL_S550 /* 1. MODEL_68CS 2. MODEL_S530 3. MODEL_S550 */
 
 #endif