diff --git a/lib/ipset/add.js b/lib/ipset/add.js
index e74f525..2c53f52 100644
--- a/lib/ipset/add.js
+++ b/lib/ipset/add.js
@@ -48,11 +48,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/create.js b/lib/ipset/create.js
index f574313..ca9fc7b 100644
--- a/lib/ipset/create.js
+++ b/lib/ipset/create.js
@@ -48,11 +48,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/del.js b/lib/ipset/del.js
index e52c47d..f1bfa39 100644
--- a/lib/ipset/del.js
+++ b/lib/ipset/del.js
@@ -48,11 +48,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/destroy.js b/lib/ipset/destroy.js
index 17254ba..6e34d29 100644
--- a/lib/ipset/destroy.js
+++ b/lib/ipset/destroy.js
@@ -46,11 +46,11 @@ module.exports = function (/* options?, cb */) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/flush.js b/lib/ipset/flush.js
index 1a9e7a2..b9121a3 100644
--- a/lib/ipset/flush.js
+++ b/lib/ipset/flush.js
@@ -46,11 +46,11 @@ module.exports = function (/* options?, cb */) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/rename.js b/lib/ipset/rename.js
index f49a1b4..8baaab7 100644
--- a/lib/ipset/rename.js
+++ b/lib/ipset/rename.js
@@ -37,11 +37,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/swap.js b/lib/ipset/swap.js
index 01b6bd5..28b6db5 100644
--- a/lib/ipset/swap.js
+++ b/lib/ipset/swap.js
@@ -37,11 +37,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/ipset/test.js b/lib/ipset/test.js
index 296250c..f31f9ba 100644
--- a/lib/ipset/test.js
+++ b/lib/ipset/test.js
@@ -14,7 +14,7 @@ module.exports = function (options, cb) {
   var ipset_cmd = (options.sudo)
     ? 'sudo'
     : '';
-  
+
   /*
    * Build cmd to execute.
    */
@@ -48,11 +48,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      }, error.code);
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err, error.code);
     }
     else if (cb) {
       cb(null, 0);
diff --git a/lib/ipset/version.js b/lib/ipset/version.js
index 020b0d1..3627916 100644
--- a/lib/ipset/version.js
+++ b/lib/ipset/version.js
@@ -24,11 +24,11 @@ module.exports = function (cb) {
    */
   exec(cmd.join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null, stdout.split('\n')[0]);
diff --git a/lib/iptables/append.js b/lib/iptables/append.js
index badf8ad..9f0204a 100644
--- a/lib/iptables/append.js
+++ b/lib/iptables/append.js
@@ -48,11 +48,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/delete.js b/lib/iptables/delete.js
index c1d77eb..1dfb4c2 100644
--- a/lib/iptables/delete.js
+++ b/lib/iptables/delete.js
@@ -53,11 +53,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/delete_chain.js b/lib/iptables/delete_chain.js
index 1e29470..f187da3 100644
--- a/lib/iptables/delete_chain.js
+++ b/lib/iptables/delete_chain.js
@@ -56,11 +56,11 @@ module.exports = function (/* options?, cb */) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/flush.js b/lib/iptables/flush.js
index 395aeb3..6147cfc 100644
--- a/lib/iptables/flush.js
+++ b/lib/iptables/flush.js
@@ -56,11 +56,11 @@ module.exports = function (/* options?, cb */) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/insert.js b/lib/iptables/insert.js
index cd7427a..e95fabd 100644
--- a/lib/iptables/insert.js
+++ b/lib/iptables/insert.js
@@ -53,11 +53,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/new.js b/lib/iptables/new.js
index 2fc3087..f598f4c 100644
--- a/lib/iptables/new.js
+++ b/lib/iptables/new.js
@@ -43,11 +43,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/policy.js b/lib/iptables/policy.js
index 70bbb0e..558fbcd 100644
--- a/lib/iptables/policy.js
+++ b/lib/iptables/policy.js
@@ -47,11 +47,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/rename.js b/lib/iptables/rename.js
index fc31219..fdcb5ff 100644
--- a/lib/iptables/rename.js
+++ b/lib/iptables/rename.js
@@ -47,11 +47,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/replace.js b/lib/iptables/replace.js
index ebaefbe..7bac661 100644
--- a/lib/iptables/replace.js
+++ b/lib/iptables/replace.js
@@ -53,11 +53,11 @@ module.exports = function (options, cb) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/lib/iptables/zero.js b/lib/iptables/zero.js
index 7c4ebc2..8d49d3f 100644
--- a/lib/iptables/zero.js
+++ b/lib/iptables/zero.js
@@ -60,11 +60,11 @@ module.exports = function (/* options?, cb */) {
    */
   exec(cmd.concat(args).join(' '), function (error, stdout, stderror) {
     if (error && cb) {
-      cb({
-        msg : stderror.split('\n')[0],
-        cmd : cmd.concat(args).join(' '),
-        code: error.code
-      });
+      var err = new Error(stderror.split('\n')[0]);
+      err.cmd = cmd.concat(args).join(' ');
+      err.code = error.code;
+
+      cb(err);
     }
     else if (cb) {
       cb(null);
diff --git a/package.json b/package.json
index 13e12d2..b16fc29 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name"        : "netfilter",
-  "version"     : "0.2.2",
+  "version"     : "0.2.3",
   "description" : "Packet filtering framework. Wrapper to provide netfilter capabilities from Node.js",
   "main"        : "index.js",
   "keywords"    : [