diff --git a/XmlSchemaClassGenerator/CodeUtilities.cs b/XmlSchemaClassGenerator/CodeUtilities.cs
index 21ea8409..f56e7ac1 100644
--- a/XmlSchemaClassGenerator/CodeUtilities.cs
+++ b/XmlSchemaClassGenerator/CodeUtilities.cs
@@ -335,12 +335,7 @@ public static KeyValuePair<NamespaceKey, string> ParseNamespace(string nsArg, st
             var parts = nsArg.Split(new[] { '=' }, 2);
 
             if (parts.Length == 1)
-            {
-                var ns = parts[0];
-                if (!string.IsNullOrEmpty(namespacePrefix))
-                    ns = namespacePrefix + "." + ns;
-                return new KeyValuePair<NamespaceKey, string>(new NamespaceKey(), ns);
-            }
+                parts = new[] { string.Empty, parts[0] };
 
             if (parts.Length != 2)
                 throw new ArgumentException("XML and C# namespaces should be separated by '='. You entered: " + nsArg);