diff --git a/servers/vfs/proto.h b/servers/vfs/proto.h
index 11c3a90df..6719e55f0 100644
--- a/servers/vfs/proto.h
+++ b/servers/vfs/proto.h
@@ -141,6 +141,7 @@ _PROTOTYPE( int select_match_pipe, (struct filp *f)			);
 _PROTOTYPE( void unsuspend_by_endpt, (endpoint_t)			);
 _PROTOTYPE( void select_reply1, (void)					);
 _PROTOTYPE( void select_reply2, (void)					);
+_PROTOTYPE( void wait_for, (endpoint_t)					);
 #if DO_SANITYCHECKS
 _PROTOTYPE( int check_pipe, (void)					);
 #endif