diff --git a/include/linux/shm.h b/include/linux/shm.h
index 3a8eae3ca33c6e21463eba6ece74bb0130e6d2b1..d8e69aed3d322d2b5a1ad05c4e6032fa25e68daf 100644
--- a/include/linux/shm.h
+++ b/include/linux/shm.h
@@ -7,6 +7,8 @@
 #include <uapi/linux/shm.h>
 #include <asm/shmparam.h>
 
+struct file;
+
 #ifdef CONFIG_SYSVIPC
 struct sysv_shm {
 	struct list_head shm_clist;