diff --git a/package.json b/package.json
index dd288de..31ab415 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "title": "UA-Parser.JS",
   "name": "ua-parser-js",
-  "version": "0.4.3",
+  "version": "0.4.4",
   "author": "Faisal Salman <fyzlman@gmail.com> (http://faisalman.com)",
   "description": "Lightweight JavaScript-based user-agent string parser",
   "keywords": [
diff --git a/ua-parser.js b/ua-parser.js
index 4cf9ad0..82e5a9d 100644
--- a/ua-parser.js
+++ b/ua-parser.js
@@ -1,4 +1,4 @@
-// UA-Parser.JS v0.4.3
+// UA-Parser.JS v0.4.4
 // Lightweight JavaScript-based User-Agent string parser
 // https://github.com/faisalman/ua-parser-js
 //
@@ -45,7 +45,7 @@
                             if (typeof props[k] === 'object' && props[k].length === 2) {
                                 result[props[k][0]] = props[k][1];
                             } else if (typeof props[k] === 'object' && props[k].length === 3) {
-                                if (typeof props[k][1] === 'function') {
+                                if (typeof props[k][1] === 'function' && !(props[k][1].exec && props[k][1].test)) {
                                     result[props[k][0]] = m ? props[k][1].call(this, m, props[k][2]) : undefined;
                                 } else {
                                     result[props[k][0]] = m ? m.replace(props[k][1], props[k][2]) : undefined;