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-rw-r--r--plugins/firstorder/instances.ml1
1 files changed, 1 insertions, 0 deletions
diff --git a/plugins/firstorder/instances.ml b/plugins/firstorder/instances.ml
index e1d765a42..92372fe29 100644
--- a/plugins/firstorder/instances.ml
+++ b/plugins/firstorder/instances.ml
@@ -6,6 +6,7 @@
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
+open API
open Unify
open Rules
open CErrors