diff --git a/include/linux/key.h b/include/linux/key.h
index 21d32a142c002b47da72abb18d9761a3e88aee11..e544f466d69a421cf48f2b626b0bf90d1ec22033 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -20,6 +20,7 @@
 #include <linux/rbtree.h>
 #include <linux/rcupdate.h>
 #include <linux/sysctl.h>
+#include <linux/rwsem.h>
 #include <asm/atomic.h>
 
 #ifdef __KERNEL__