diff --git a/pkgs/tools/networking/connman/connman-ncurses/default.nix b/pkgs/tools/networking/connman/connman-ncurses/default.nix
index 7bfb4571e107..1e7f54f9ddbe 100644
--- a/pkgs/tools/networking/connman/connman-ncurses/default.nix
+++ b/pkgs/tools/networking/connman/connman-ncurses/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, dbus, json_c, ncurses, connman }:
+{ stdenv, fetchpatch, fetchFromGitHub, autoreconfHook, pkgconfig, dbus, json_c, ncurses, connman }:
 
 stdenv.mkDerivation {
   pname = "connman-ncurses";
@@ -11,12 +11,21 @@ stdenv.mkDerivation {
     sha256 = "1831r0776fv481g8kgy1dkl750pzv47835dw11sslq2k6mm6i9p1";
   };
 
+  patches = [
+    # Fix build with json-c 0.14
+    (fetchpatch {
+      url = "https://github.com/void-linux/void-packages/raw/5830ce60e922b7dced8157ededda8c995adb3bb9/srcpkgs/connman-ncurses/patches/lowercase-boolean.patch";
+      extraPrefix = "";
+      sha256 = "uK83DeRyXS2Y0ZZpTYvYNh/1ZM2QQ7QpajiBztaEuSM=";
+    })
+  ];
+
   nativeBuildInputs = [ autoreconfHook pkgconfig ];
 
   buildInputs = [ dbus ncurses json_c connman ];
 
   NIX_CFLAGS_COMPILE = "-Wno-error";
-  
+
   installPhase = ''
     mkdir -p "$out/bin"
     cp -va connman_ncurses "$out/bin/"