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-rw-r--r--gnu/system/mapped-devices.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/gnu/system/mapped-devices.scm b/gnu/system/mapped-devices.scm
index 7c58f876a3..c3f98302ad 100644
--- a/gnu/system/mapped-devices.scm
+++ b/gnu/system/mapped-devices.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2016 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2017, 2018 Mark H Weaver <mhw@netris.org>
 ;;;
@@ -40,6 +40,7 @@
   #:use-module (srfi srfi-34)
   #:use-module (srfi srfi-35)
   #:use-module (ice-9 match)
+  #:use-module (ice-9 format)
   #:export (mapped-device
             mapped-device?
             mapped-device-source