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-rw-r--r--intf/tacexpr.mli2
1 files changed, 1 insertions, 1 deletions
diff --git a/intf/tacexpr.mli b/intf/tacexpr.mli
index df4ed2c41e..435064b998 100644
--- a/intf/tacexpr.mli
+++ b/intf/tacexpr.mli
@@ -283,4 +283,4 @@ type raw_tactic_arg =
type raw_red_expr = (r_trm, r_cst, r_pat) red_expr_gen
type glob_red_expr = (g_trm, g_cst, g_pat) red_expr_gen
-type 'a declaration_hook = locality -> global_reference -> 'a
+type 'a declaration_hook = (locality -> global_reference -> 'a) option