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-rw-r--r--lib/flags.mli1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/flags.mli b/lib/flags.mli
index ab06eda306..69caad5b62 100644
--- a/lib/flags.mli
+++ b/lib/flags.mli
@@ -90,6 +90,7 @@ val is_universe_polymorphism : unit -> bool
val make_polymorphic_flag : bool -> unit
val use_polymorphic_flag : unit -> bool
+val warn : bool ref
val make_warn : bool -> unit
val if_warn : ('a -> unit) -> 'a -> unit