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diff --git a/printing/ppconstrsig.mli b/printing/ppconstrsig.mli
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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+open Loc
+open Pp
+open Libnames
+open Constrexpr
+open Names
+open Misctypes
+open Locus
+open Genredexpr
+
+module type Pp = sig
+
+  val extract_lam_binders :
+    constr_expr -> local_binder list * constr_expr
+  val extract_prod_binders :
+    constr_expr -> local_binder list * constr_expr
+  val split_fix :
+    int -> constr_expr -> constr_expr ->
+    local_binder list *  constr_expr * constr_expr
+
+  val prec_less : int -> int * Ppextend.parenRelation -> bool
+
+  val pr_tight_coma : unit -> std_ppcmds
+
+  val pr_or_var : ('a -> std_ppcmds) -> 'a or_var -> std_ppcmds
+
+  val pr_lident : Id.t located -> std_ppcmds
+  val pr_lname : Name.t located -> std_ppcmds
+
+  val pr_with_comments : Loc.t -> std_ppcmds -> std_ppcmds
+  val pr_com_at : int -> std_ppcmds
+  val pr_sep_com :
+    (unit -> std_ppcmds) ->
+    (constr_expr -> std_ppcmds) ->
+    constr_expr -> std_ppcmds
+
+  val pr_id : Id.t -> std_ppcmds
+  val pr_name : Name.t -> std_ppcmds
+  val pr_qualid : qualid -> std_ppcmds
+  val pr_patvar : patvar -> std_ppcmds
+
+  val pr_glob_sort : glob_sort -> std_ppcmds
+  val pr_guard_annot : (constr_expr -> std_ppcmds) ->
+    local_binder list ->
+    ('a * Names.Id.t) option * recursion_order_expr ->
+    std_ppcmds
+
+  val pr_binders : local_binder list -> std_ppcmds
+  val pr_constr_pattern_expr : constr_pattern_expr -> std_ppcmds
+  val pr_lconstr_pattern_expr : constr_pattern_expr -> std_ppcmds
+  val pr_constr_expr : constr_expr -> std_ppcmds
+  val pr_lconstr_expr : constr_expr -> std_ppcmds
+  val pr_cases_pattern_expr : cases_pattern_expr -> std_ppcmds
+
+  type term_pr = {
+    pr_constr_expr   : constr_expr -> std_ppcmds;
+    pr_lconstr_expr  : constr_expr -> std_ppcmds;
+    pr_constr_pattern_expr  : constr_pattern_expr -> std_ppcmds;
+    pr_lconstr_pattern_expr : constr_pattern_expr -> std_ppcmds
+  }
+
+  val set_term_pr : term_pr -> unit
+  val default_term_pr : term_pr
+
+(** The modular constr printer.
+    [modular_constr_pr pr s p t] prints the head of the term [t] and calls
+    [pr] on its subterms.
+    [s] is typically {!Pp.mt} and [p] is [lsimpleconstr] for "constr" printers
+    and [ltop] for "lconstr" printers (spiwack: we might need more
+    specification here).
+    We can make a new modular constr printer by overriding certain branches,
+    for instance if we want to build a printer which prints "Prop" as "Omega"
+    instead we can proceed as follows:
+    let my_modular_constr_pr pr s p = function
+    | CSort (_,GProp Null) -> str "Omega"
+    | t -> modular_constr_pr pr s p t
+    Which has the same type. We can turn a modular printer into a printer by
+    taking its fixpoint. *)
+
+  type precedence
+  val lsimpleconstr : precedence
+  val ltop : precedence
+  val modular_constr_pr :
+    ((unit->std_ppcmds) -> precedence -> constr_expr -> std_ppcmds) ->
+    (unit->std_ppcmds) -> precedence  -> constr_expr -> std_ppcmds
+
+end
+