diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index db6f3f9..b5f6a10 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -361,7 +361,7 @@
 			return 0;
 		}
 
-		mdelay(1);
+		mdelay(10);
 	}
 
 	ERROR("ACMD41 failed after %d retries\n", SEND_OP_COND_MAX_RETRIES);