diff --git a/pkgs/tools/networking/mtr/default.nix b/pkgs/tools/networking/mtr/default.nix
index 1257c167e768..f9209158f6dd 100644
--- a/pkgs/tools/networking/mtr/default.nix
+++ b/pkgs/tools/networking/mtr/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchFromGitHub, autoreconfHook, pkg-config
-, libcap, ncurses
+, libcap, ncurses, jansson
 , withGtk ? false, gtk3 }:
 
 stdenv.mkDerivation rec {
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
-  buildInputs = [ ncurses ]
+  buildInputs = [ ncurses jansson ]
     ++ lib.optional withGtk gtk3
     ++ lib.optional stdenv.isLinux libcap;