diff --git a/drivers/clk/clk-renesas-pcie.c b/drivers/clk/clk-renesas-pcie.c
index 7d7b2cb75318..3b6ad2307a41 100644
--- a/drivers/clk/clk-renesas-pcie.c
+++ b/drivers/clk/clk-renesas-pcie.c
@@ -163,7 +163,7 @@ static u8 rs9_calc_dif(const struct rs9_driver_data *rs9, int idx)
 	enum rs9_model model = rs9->chip_info->model;
 
 	if (model == RENESAS_9FGV0241)
-		return BIT(idx) + 1;
+		return BIT(idx + 1);
 	else if (model == RENESAS_9FGV0441)
 		return BIT(idx);