diff --git a/gnu/packages/networking.scm b/gnu/packages/networking.scm
index 21f8fc8d1d..f5f1f447cb 100644
--- a/gnu/packages/networking.scm
+++ b/gnu/packages/networking.scm
@@ -24,7 +24,7 @@
 ;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2018 Theodoros Foradis <theodoros@foradis.org>
 ;;; Copyright © 2018, 2020-2022 Marius Bakke <marius@gnu.org>
-;;; Copyright © 2018, 2020, 2021 Oleg Pykhalov <go.wigust@gmail.com>
+;;; Copyright © 2018, 2020, 2021, 2022 Oleg Pykhalov <go.wigust@gmail.com>
 ;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2019, 2020, 2021, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2019 Vasile Dumitrascu <va511e@yahoo.com>
@@ -3090,8 +3090,9 @@ (define-public mtr
        (sha256
         (base32 "0haanralbvd12pvkyihgkmx9ld74dnzm1s7mzparfandl416ibff"))))
     (build-system gnu-build-system)
+    (native-inputs (list pkg-config))
     (inputs
-     (list libcap ncurses))
+     (list jansson libcap ncurses))
     (arguments
      `(#:tests? #f))                    ; tests require network access
     (home-page "https://www.bitwizard.nl/mtr/")