diff --git a/src/ersky9x/diskio.c b/src/ersky9x/diskio.c
index bea741193..96e8610cb 100644
--- a/src/ersky9x/diskio.c
+++ b/src/ersky9x/diskio.c
@@ -711,6 +711,7 @@ const char * sdEnum()
 }
 #endif
 
+#if 0
 void sdInit()
 {
   const char * result;
@@ -807,6 +808,7 @@ void sdInit()
   pSd->accSpeed = clock;
 #endif
 }
+#endif
 
 uint8_t sdErrorCount = 0;
 FATFS g_FATFS_Obj;