diff --git a/src/x9d/board_x9d.h b/src/x9d/board_x9d.h
index b3e99be99..710283840 100644
--- a/src/x9d/board_x9d.h
+++ b/src/x9d/board_x9d.h
@@ -55,6 +55,7 @@ extern uint32_t Peri2_frequency ;
 #define SD_IS_HC()                     (1)
 #endif
 
+#define sdInit()
 void sdPoll10ms();
 
 void usbMassStorage();