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-rw-r--r--theories/Sorting/Permutation.v1
-rw-r--r--theories/Sorting/Sorted.v2
2 files changed, 3 insertions, 0 deletions
diff --git a/theories/Sorting/Permutation.v b/theories/Sorting/Permutation.v
index acad98e5f..899acfc64 100644
--- a/theories/Sorting/Permutation.v
+++ b/theories/Sorting/Permutation.v
@@ -16,6 +16,7 @@
Require Import List Setoid Compare_dec Morphisms FinFun.
Import ListNotations. (* For notations [] and [a;b;c] *)
Set Implicit Arguments.
+Set Universe Polymorphism.
Section Permutation.
diff --git a/theories/Sorting/Sorted.v b/theories/Sorting/Sorted.v
index 03952c95a..a89b90238 100644
--- a/theories/Sorting/Sorted.v
+++ b/theories/Sorting/Sorted.v
@@ -20,6 +20,8 @@
Require Import List Relations Relations_1.
+Set Universe Polymorphism.
+
(** Preambule *)
Set Implicit Arguments.