diff -r d63b111b917a -r b38c67991122 src/Pure/Syntax/mixfix.ML
--- a/src/Pure/Syntax/mixfix.ML	Wed Jan 18 10:17:55 1995 +0100
+++ b/src/Pure/Syntax/mixfix.ML	Wed Jan 18 11:36:04 1995 +0100
@@ -13,7 +13,7 @@
     Delimfix of string |
     Infixl of int |
     Infixr of int |
-    Binder of string * int
+    Binder of string * int * int
   val max_pri: int
 end;
 
@@ -52,7 +52,7 @@
   Delimfix of string |
   Infixl of int |
   Infixr of int |
-  Binder of string * int;
+  Binder of string * int * int
 
 
 (* type / const names *)
@@ -118,10 +118,10 @@
       | mfix_of (c, ty, Delimfix sy) = [Mfix (sy, ty, c, [], max_pri)]
       | mfix_of (sy, ty, Infixl p) = mk_infix sy ty (infix_name sy) p (p + 1) p
       | mfix_of (sy, ty, Infixr p) = mk_infix sy ty (infix_name sy) (p + 1) p p
-      | mfix_of (c, ty, Binder (sy, p)) =
-          [Mfix ("(3" ^ sy ^ "_./ _)", binder_typ c ty, sy, [], p)];
+      | mfix_of (c, ty, Binder (sy, p2, p)) =
+          [Mfix ("(3" ^ sy ^ "_./ _)", binder_typ c ty, sy, [0, p2], p)];
 
-    fun binder (c, _, Binder (sy, _)) = Some (sy, c)
+    fun binder (c, _, Binder (sy, _, _)) = Some (sy, c)
       | binder _ = None;
 
     val mfix = flat (map mfix_of const_decls);