diff --git a/lib/OpenLayers/SingleFile.js b/lib/OpenLayers/SingleFile.js
index 7188c5a2ee..55fb854e44 100644
--- a/lib/OpenLayers/SingleFile.js
+++ b/lib/OpenLayers/SingleFile.js
@@ -7,9 +7,13 @@ var OpenLayers = {
     singleFile: true,
     _getScriptLocation: (function() {
         var s = document.getElementsByTagName('script');
-        var l = s[s.length-1].getAttribute("src").match(/(^|(.*?\/))(OpenLayers\.js)(\?|$)/)[1];
+        var match = s[s.length-1].getAttribute("src").match(/(^|(.*?\/))(OpenLayers\.js)(\?|$)/);
+        var l = match ? match[1] : "";
         return (function() { return l; });
     })()
 };
 
-
+/**
+ * Constant: VERSION_NUMBER
+ */
+OpenLayers.VERSION_NUMBER="$Revision$";