diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
index b31c13b..3110bb0 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -1656,6 +1656,10 @@ unsigned long get_mmc_clk(int dev_index)
 
 void set_mmc_clk(int dev_index, unsigned int div)
 {
+	/* If want to set correct value, it needs to substract one from div.*/
+	if (div > 0)
+		div -= 1;
+
 	if (cpu_is_exynos5()) {
 		if (proid_is_exynos5420() || proid_is_exynos5800())
 			exynos5420_set_mmc_clk(dev_index, div);