diff --git a/board/renesas/silk/silk.c b/board/renesas/silk/silk.c
index fe753a7..171d06f 100644
--- a/board/renesas/silk/silk.c
+++ b/board/renesas/silk/silk.c
@@ -18,6 +18,7 @@
 #include <asm/processor.h>
 #include <asm/mach-types.h>
 #include <asm/io.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
 #include <asm/arch/sys_proto.h>
diff --git a/board/renesas/silk/silk_spl.c b/board/renesas/silk/silk_spl.c
index 9859977..f10f84a 100644
--- a/board/renesas/silk/silk_spl.c
+++ b/board/renesas/silk/silk_spl.c
@@ -13,6 +13,7 @@
 #include <asm/processor.h>
 #include <asm/mach-types.h>
 #include <asm/io.h>
+#include <linux/bitops.h>
 #include <linux/errno.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/gpio.h>