diff --git a/lib/tokamak/builder/xml.rb b/lib/tokamak/builder/xml.rb
index 25e18c1..5d95c03 100644
--- a/lib/tokamak/builder/xml.rb
+++ b/lib/tokamak/builder/xml.rb
@@ -59,7 +59,7 @@ def insert_value(name, prefix, *args, &block)
       end
 
       def representation
-        @raw.to_xml
+        @raw.to_xml.sub!(/^(\s+)?<\?xml version="1\.0"\?>\n?/, "")
       end
 
     private