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-rw-r--r--pretyping/pretype_errors.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/pretyping/pretype_errors.ml b/pretyping/pretype_errors.ml
index cad0beabf..e16d1206a 100644
--- a/pretyping/pretype_errors.ml
+++ b/pretyping/pretype_errors.ml
@@ -14,7 +14,7 @@ open Type_errors
type unification_error =
| OccurCheck of existential_key * constr
- | NotClean of existential * constr
+ | NotClean of existential * env * constr
| NotSameArgSize
| NotSameHead
| NoCanonicalStructure