diff --git a/src/Orchard/Utility/Extensions/StringExtensions.cs b/src/Orchard/Utility/Extensions/StringExtensions.cs
index 093bd1e95..93dc3888f 100644
--- a/src/Orchard/Utility/Extensions/StringExtensions.cs
+++ b/src/Orchard/Utility/Extensions/StringExtensions.cs
@@ -173,9 +173,7 @@ namespace Orchard.Utility.Extensions {
 
             name = RemoveDiacritics(name);
             name = name.Strip(c => 
-                c != '_' 
-                && c != '-' 
-                && !c.IsLetter()
+                !c.IsLetter()
                 && !Char.IsDigit(c)
                 );