diff --git a/src/tusb_option.h b/src/tusb_option.h
index fc509ae76..d2a9ad804 100644
--- a/src/tusb_option.h
+++ b/src/tusb_option.h
@@ -70,6 +70,8 @@
 
 #define OPT_MCU_CXD56         400 ///< SONY CXD56
 
+#define OPT_MCU_FOMU_EPTRI    600 ///< Fomu eptri config
+
 /** @} */
 
 /** \defgroup group_supported_os Supported RTOS