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-rw-r--r--pretyping/unification.ml1
1 files changed, 1 insertions, 0 deletions
diff --git a/pretyping/unification.ml b/pretyping/unification.ml
index 31148ee39..f3014424c 100644
--- a/pretyping/unification.ml
+++ b/pretyping/unification.ml
@@ -10,6 +10,7 @@ open Errors
open Util
open Names
open Term
+open Vars
open Termops
open Namegen
open Environ