diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index 5edc85ab04b4..e5edf1b90841 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -50,8 +50,8 @@ struct cpg_z_clk {
 	struct clk_hw hw;
 	void __iomem *reg;
 	void __iomem *kick_reg;
-	unsigned long mask;
 	unsigned int fixed_div;
+	u32 mask;
 };
 
 #define to_z_clk(_hw)	container_of(_hw, struct cpg_z_clk, hw)