diff --git a/theories/base.v b/theories/base.v
index 7d63f1249391776006db679758172c8fd4b09307..a4cfdfb32ad72b913dae2f8b6ed1f556cf72e9f2 100644
--- a/theories/base.v
+++ b/theories/base.v
@@ -3,7 +3,7 @@ that are used throughout the whole development. Most importantly it contains
 abstract interfaces for ordered structures, sets, and various other data
 structures. *)
 
-From Coq Require Export Morphisms RelationClasses List Bool Utf8 Setoid.
+From Coq Require Export Morphisms RelationClasses List Bool Utf8 Setoid Arith.
 From Coq Require Import Permutation.
 Set Default Proof Using "Type".
 Export ListNotations.
diff --git a/theories/numbers.v b/theories/numbers.v
index d0b9d29d04566e1fda5cbc394844599dd5177f93..663fde2a4cf7281561f26bedbaa7c793b1079cc9 100644
--- a/theories/numbers.v
+++ b/theories/numbers.v
@@ -1,7 +1,7 @@
 (** This file collects some trivial facts on the Coq types [nat] and [N] for
 natural numbers, and the type [Z] for integers. It also declares some useful
 notations. *)
-From Coq Require Export EqdepFacts PArith NArith ZArith NPeano.
+From Coq Require Export EqdepFacts PArith NArith ZArith.
 From Coq Require Import QArith Qcanon.
 From stdpp Require Export base decidable option.
 Set Default Proof Using "Type".