diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c
index 6db2ccabc2bf95fe0cf4d99a90b382d0271d116c..61a846bb30f2034ec3ae69253aea2d2d6d695aa8 100644
--- a/arch/arm/mach-shmobile/clock-sh73a0.c
+++ b/arch/arm/mach-shmobile/clock-sh73a0.c
@@ -365,7 +365,7 @@ void __init sh73a0_clock_init(void)
 	__raw_writel(0x108, SD2CKCR);
 
 	/* detect main clock parent */
-	switch ((__raw_readl(CKSCR) >> 24) & 0x03) {
+	switch ((__raw_readl(CKSCR) >> 28) & 0x03) {
 	case 0:
 		main_clk.parent = &sh73a0_extal1_clk;
 		break;