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-rw-r--r--plugins/firstorder/rules.ml1
1 files changed, 1 insertions, 0 deletions
diff --git a/plugins/firstorder/rules.ml b/plugins/firstorder/rules.ml
index 8abf9d7e2..02a0dd20d 100644
--- a/plugins/firstorder/rules.ml
+++ b/plugins/firstorder/rules.ml
@@ -10,6 +10,7 @@ open Errors
open Util
open Names
open Term
+open Vars
open Tacmach
open Tactics
open Tacticals