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-rw-r--r--theories/Numbers/Natural/Abstract/NBase.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/theories/Numbers/Natural/Abstract/NBase.v b/theories/Numbers/Natural/Abstract/NBase.v
index f26f56d0c5..249674f3e6 100644
--- a/theories/Numbers/Natural/Abstract/NBase.v
+++ b/theories/Numbers/Natural/Abstract/NBase.v
@@ -11,6 +11,7 @@
Require Export Decidable.
Require Export NAxioms.
Require Import NZProperties.
+Import Morphisms_Prop. (* For Hints *)
Module NBasePropFunct (Import N : NAxiomsSig').
(** First, we import all known facts about both natural numbers and integers. *)