diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index de554b7..a73a963 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -138,5 +138,8 @@
 extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
 			     const u64 persistent_fid, const u64 volatile_fid,
 			     const __u8 oplock_level);
+extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
+			 u64 persistent_file_id, u64 volatile_file_id,
+			 struct kstatfs *FSData);
 
 #endif			/* _SMB2PROTO_H */