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-rw-r--r--kernel/type_errors.mli1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/type_errors.mli b/kernel/type_errors.mli
index 09310b42b..37370377d 100644
--- a/kernel/type_errors.mli
+++ b/kernel/type_errors.mli
@@ -31,6 +31,7 @@ type guard_error =
| RecCallInCaseArg of constr
| RecCallInCasePred of constr
| NotGuardedForm of constr
+ | ReturnPredicateNotCoInductive of constr
type arity_error =
| NonInformativeToInformative