diff --git a/include/linux/fs.h b/include/linux/fs.h
index 57e294b..7e1b589 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1280,6 +1280,7 @@
 /* fs/open.c */
 
 extern int do_truncate(struct dentry *, loff_t start);
+extern long do_sys_open(const char __user *filename, int flags, int mode);
 extern struct file *filp_open(const char *, int, int);
 extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
 extern int filp_close(struct file *, fl_owner_t id);