diff --git a/firmware/export/config-ondavx747.h b/firmware/export/config-ondavx747.h
index 0fcfd3cf99..c9f80e0a3d 100644
--- a/firmware/export/config-ondavx747.h
+++ b/firmware/export/config-ondavx747.h
@@ -206,6 +206,8 @@
 
 #ifdef ONDA_VX747P
 #define BOOTFILE_EXT "vx747p"
+#elif defined(ONDA_VX777)
+#define BOOTFILE_EXT "vx777"
 #else
 #define BOOTFILE_EXT "vx747"
 #endif