diff --git a/lib/FatFs/source/diskio.c b/lib/FatFs/source/diskio.c
index 592175e..dbf7c01 100644
--- a/lib/FatFs/source/diskio.c
+++ b/lib/FatFs/source/diskio.c
@@ -50,7 +50,6 @@ DSTATUS disk_initialize (
 {
 	DSTATUS stat;
 	int result;
-	printf("disk_initialize : %d\n", pdrv);
 	if(pdrv >= DEV_SDIO_MIN && pdrv <= DEV_SDIO_MAX){
 		SDIO_disk_initialize(pdrv - DEV_SDIO_MIN);
 		return 0; // OK