diff --git a/arch/mips/include/asm/cm.h b/arch/mips/include/asm/cm.h
index 8f37471..3878171 100644
--- a/arch/mips/include/asm/cm.h
+++ b/arch/mips/include/asm/cm.h
@@ -39,6 +39,7 @@
 #ifndef __ASSEMBLY__
 
 #include <asm/io.h>
+#include <linux/bitops.h>
 
 static inline void *mips_cm_base(void)
 {