diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6f1fd02..e062997 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1068,7 +1068,7 @@
 	u16 clk = 0;
 	unsigned long timeout;
 
-	if (clock == host->clock)
+	if (clock && clock == host->clock)
 		return;
 
 	host->mmc->actual_clock = 0;