diff --git a/interface/fs.xpc b/interface/fs.xpc
index dec7867..cb882fd 100644
--- a/interface/fs.xpc
+++ b/interface/fs.xpc
@@ -11,3 +11,4 @@ func seek[4](offset: offset, origin: int) -> (err: int, new_pos: offset);
 func map[5](prot: int, flags: int) -> (err: int, vmo: handle);
 
 func getdents[6]() -> (err: int, dents: buffer);
+func mount[7](path: string, nd: int, pid: int, chid: int) -> (err: int);