diff --git a/README.md b/README.md
index d9c9582fd..86232f36a 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ Bug Fixes
 * The Static, Kinematic and Dynamic consts that P2.Body uses were incorrect (fixes #563)
 * Sprite.destroy would fail if it had an Arcade Physics body, now added.
 * Group.getAt comparison updated (fixes #578)
-
+* Fixed the IE11 version check (fixes #579)
 
 
 Version 2.0.0 - "Aes Sedai" - March 13th 2014
diff --git a/src/system/Device.js b/src/system/Device.js
index 15e500a27..44922cc84 100644
--- a/src/system/Device.js
+++ b/src/system/Device.js
@@ -579,12 +579,12 @@ Phaser.Device.prototype = {
         {
             this.silk = true;
         }
-        else if (/Trident\/(\d+\.\d+); rv:(\d+\.\d+)/.test(ua))
+        else if (/Trident\/(\d+\.\d+)(.*)rv:(\d+\.\d+)/.test(ua))
         {
             this.ie = true;
             this.trident = true;
             this.tridentVersion = parseInt(RegExp.$1, 10);
-            this.ieVersion = parseInt(RegExp.$2, 10);
+            this.ieVersion = parseInt(RegExp.$3, 10);
         }
 
         // WebApp mode in iOS