1 files changed, 2 insertions, 0 deletions
diff --git a/ppc.sig b/ppc.sig
index 0bfaca7..f700634 100644
--- a/ppc.sig
+++ b/ppc.sig
@@ -21,5 +21,7 @@ signature PPC = sig
   val getToken: t -> T.token * tkPos * t
   val debugPrint: string -> string list -> unit
 
+  val ? : (int, 'a, 'b, 'c) a1printer
+  val Ptk: (T.token, 'a, 'b, 'c) a1printer
   val PtkPos: (tkPos, 'a, 'b, 'c) a1printer
 end