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-rw-r--r--backend/Machabstr2concr.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/backend/Machabstr2concr.v b/backend/Machabstr2concr.v
index 481b561c..125cd57a 100644
--- a/backend/Machabstr2concr.v
+++ b/backend/Machabstr2concr.v
@@ -12,6 +12,7 @@
(** Simulation between the two semantics for the Mach language. *)
+Require Import Axioms.
Require Import Coqlib.
Require Import Maps.
Require Import AST.