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-rw-r--r--vernac/vernacexpr.ml3
1 files changed, 1 insertions, 2 deletions
diff --git a/vernac/vernacexpr.ml b/vernac/vernacexpr.ml
index 721e710e1d..eeebb43114 100644
--- a/vernac/vernacexpr.ml
+++ b/vernac/vernacexpr.ml
@@ -106,8 +106,7 @@ type search_restriction =
type verbose_flag = bool (* true = Verbose; false = Silent *)
type coercion_flag = bool (* true = AddCoercion false = NoCoercion *)
-type instance_flag = unit option
- (* Some () = Backward instance, None = NoInstance *)
+type instance_flag = BackInstance | NoInstance
type export_flag = bool (* true = Export; false = Import *)