diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index f54be708220760f9a367f4a29ca1cbe7cfb7fba2..39598b9cf1d98bd0a63e762101837c938ab94f5a 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -21,6 +21,7 @@
 #ifndef _LINUX_RADIX_TREE_H
 #define _LINUX_RADIX_TREE_H
 
+#include <linux/bitops.h>
 #include <linux/preempt.h>
 #include <linux/types.h>
 #include <linux/bug.h>