diff --git a/drivers/clk/renesas/r8a7791-cpg-mssr.c b/drivers/clk/renesas/r8a7791-cpg-mssr.c
index e11c02e..25fd489 100644
--- a/drivers/clk/renesas/r8a7791-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a7791-cpg-mssr.c
@@ -17,6 +17,7 @@
 #include <common.h>
 #include <clk-uclass.h>
 #include <dm.h>
+#include <linux/bitops.h>
 
 #include <dt-bindings/clock/r8a7791-cpg-mssr.h>