diff --git a/lib/helper/XML.js b/lib/helper/XML.js
index e9613d31..98763362 100644
--- a/lib/helper/XML.js
+++ b/lib/helper/XML.js
@@ -86,7 +86,9 @@ var XML = (function () {
     XML.createElement = function (name, attributes, text) {
         if (!attributes)
             attributes = {};
-        var lindex = Math.max(name.lastIndexOf(':'), name.lastIndexOf('/')) + 1;
+        var li1 = name.lastIndexOf(':');
+        var li2 = name.indexOf(':');
+        var lindex = Math.max(li1 === li2 ? -1 : li2, name.lastIndexOf('/')) + 1;
         if (lindex !== 0) {
             attributes['xmlns:x'] = name.substring(0, lindex);
             name = 'x:' + name.substring(lindex);
diff --git a/src/helper/XML.ts b/src/helper/XML.ts
index d2517ba7..02a613b2 100644
--- a/src/helper/XML.ts
+++ b/src/helper/XML.ts
@@ -122,7 +122,9 @@ export abstract class XML
         if(!attributes)
             attributes = {};
         
-        const lindex = Math.max(name.lastIndexOf(':'), name.lastIndexOf('/')) + 1;
+        const li1 = name.lastIndexOf(':');
+        const li2 = name.indexOf(':');
+        const lindex = Math.max(li1 === li2 ? -1 : li2, name.lastIndexOf('/')) + 1;
         if(lindex !== 0)
         {
             attributes['xmlns:x'] = name.substring(0, lindex);