diff --git a/Message/Request/BrowserType.enum.js b/Message/Request/BrowserType.enum.js
index 9cc7c48..1320b7e 100644
--- a/Message/Request/BrowserType.enum.js
+++ b/Message/Request/BrowserType.enum.js
@@ -20,6 +20,7 @@
         IE: 'msie',
         EDGE: 'edge',
         CHROME: 'chrome',
-        BLINK: 'blink'
+        BLINK: 'blink',
+        UNKNOWN: 'unknown'
     });
 }(window.jsOMS = window.jsOMS || {}));
diff --git a/Message/Request/Request.js b/Message/Request/Request.js
index 39cd89d..3501263 100644
--- a/Message/Request/Request.js
+++ b/Message/Request/Request.js
@@ -65,6 +65,8 @@
         } else if ((isChrome || isOpera) && !!window.CSS) {
             return jsOMS.Message.Request.BrowserType.BLINK;
         }
+
+        return jsOMS.Message.Request.BrowserType.UNKNOWN;
     };
 
     /**