diff --git a/include/linux/quota.h b/include/linux/quota.h
index b8fbf26..77db80a 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -132,6 +132,7 @@
 
 #ifdef __KERNEL__
 #include <linux/spinlock.h>
+#include <linux/rwsem.h>
 #include <linux/mutex.h>
 
 #include <linux/dqblk_xfs.h>