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diff --git a/plugins/cc/g_congruence.mlg b/plugins/cc/g_congruence.mlg
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+(************************************************************************)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
+(*   \VV/  **************************************************************)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+{
+
+open Ltac_plugin
+open Cctac
+open Stdarg
+
+}
+
+DECLARE PLUGIN "cc_plugin"
+
+(* Tactic registration *)
+
+TACTIC EXTEND cc
+| [ "congruence" ] -> { congruence_tac 1000 [] }
+| [ "congruence" integer(n) ] -> { congruence_tac n [] }
+| [ "congruence" "with" ne_constr_list(l) ] -> { congruence_tac 1000 l }
+ |[ "congruence" integer(n) "with" ne_constr_list(l) ] ->
+   { congruence_tac n l }
+END
+
+TACTIC EXTEND f_equal
+| [ "f_equal" ] -> { f_equal }
+END