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-rw-r--r--proofs/tacexpr.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/proofs/tacexpr.ml b/proofs/tacexpr.ml
index 6b153fa10..65b330c3d 100644
--- a/proofs/tacexpr.ml
+++ b/proofs/tacexpr.ml
@@ -208,7 +208,7 @@ type ('constr,'pat,'cst,'ind,'ref,'id,'tac) gen_atomic_tactic_expr =
(* Equivalence relations *)
| TacReflexivity
| TacSymmetry of 'id gclause
- | TacTransitivity of 'constr
+ | TacTransitivity of 'constr option
(* Equality and inversion *)
| TacRewrite of