diff --git a/pkgs/development/libraries/json-c/default.nix b/pkgs/development/libraries/json-c/default.nix
index da12b732d00..b8c72d9669e 100644
--- a/pkgs/development/libraries/json-c/default.nix
+++ b/pkgs/development/libraries/json-c/default.nix
@@ -1,14 +1,12 @@
 { stdenv, fetchurl, autoreconfHook }:
 
 stdenv.mkDerivation rec {
-  name = "json-c-0.12";
+  name = "json-c-0.12.1";
   src = fetchurl {
     url    = "https://s3.amazonaws.com/json-c_releases/releases/${name}-nodoc.tar.gz";
-    sha256 = "0dgvjjyb9xva63l6sy70sdch2w4ryvacdmfd3fg2f2v13lqx5mkg";
+    sha256 = "148jkvpnxmg1fwwigp0nq9qbd5vzpnmgiw3y34w7k6fymalpsqas";
   };
 
-  patches = [ ./unused-variable.patch ];
-
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [ autoreconfHook ]; # won't configure without it, no idea why
diff --git a/pkgs/development/libraries/json-c/unused-variable.patch b/pkgs/development/libraries/json-c/unused-variable.patch
deleted file mode 100644
index 1726234c526..00000000000
--- a/pkgs/development/libraries/json-c/unused-variable.patch
+++ /dev/null
@@ -1,18 +0,0 @@
-See https://groups.google.com/forum/#!topic/json-c/TYodemkG338
-diff --git a/json_tokener.c b/json_tokener.c
-index 19de8ef..32bc8af 100644
---- a/json_tokener.c
-+++ b/json_tokener.c
-@@ -352,12 +352,10 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
- 
-     case json_tokener_state_inf: /* aka starts with 'i' */
-       {
--	int size;
- 	int size_inf;
- 	int is_negative = 0;
- 
- 	printbuf_memappend_fast(tok->pb, &c, 1);
--	size = json_min(tok->st_pos+1, json_null_str_len);
- 	size_inf = json_min(tok->st_pos+1, json_inf_str_len);
- 	char *infbuf = tok->pb->buf;
- 	if (*infbuf == '-')