diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 890fcd2fb12d..e9793d8e83a0 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -387,7 +387,7 @@ static int sdhci_omap_execute_tuning(struct mmc_host *mmc, u32 opcode)
 	 * on temperature
 	 */
 	if (temperature < -20000)
-		phase_delay = min(max_window + 4 * max_len - 24,
+		phase_delay = min(max_window + 4 * (max_len - 1) - 24,
 				  max_window +
 				  DIV_ROUND_UP(13 * max_len, 16) * 4);
 	else if (temperature < 20000)