diff --git a/drivers/staging/hikey9xx/hi6421v600-regulator.c b/drivers/staging/hikey9xx/hi6421v600-regulator.c
index 612b964b1340..d6340bb49296 100644
--- a/drivers/staging/hikey9xx/hi6421v600-regulator.c
+++ b/drivers/staging/hikey9xx/hi6421v600-regulator.c
@@ -83,7 +83,7 @@ static const unsigned int ldo34_voltages[] = {
 			.owner		= THIS_MODULE,			       \
 			.volt_table	= vtable,			       \
 			.n_voltages	= ARRAY_SIZE(vtable),		       \
-			.vsel_mask	= (1 << (ARRAY_SIZE(vtable) - 1)) - 1, \
+			.vsel_mask	= ARRAY_SIZE(vtable) - 1,	       \
 			.vsel_reg	= vreg,				       \
 			.enable_reg	= ereg,				       \
 			.enable_mask	= emask,			       \