diff --git a/Simple.Data.Ado/QueryBuilderBase.cs b/Simple.Data.Ado/QueryBuilderBase.cs
index 66309607..1914331a 100644
--- a/Simple.Data.Ado/QueryBuilderBase.cs
+++ b/Simple.Data.Ado/QueryBuilderBase.cs
@@ -314,7 +314,7 @@ protected string ToOrderByDirective(OrderByClause item)
             }
             else
             {
-                var table = _schema.FindTable(item.Reference.GetOwner().GetName());
+                var table = _schema.FindTable(item.Reference.GetOwner().ToString());
                 name = table.FindColumn(item.Reference.GetName()).QualifiedName;
             }