lib/savon/soap/xml.rb in savon-0.8.0.beta.3 vs lib/savon/soap/xml.rb in savon-0.8.0.beta.4

@@ -112,10 +112,10 @@
         defaults.merge namespaces
       end
 
       # Returns the SOAP header as an XML String.
       def header_for_xml
-        header.to_soap_xml + wsse_header
+        @header_for_xml ||= header.to_soap_xml + wsse_header
       end
 
       # Returns the WSSE header or an empty String in case WSSE was not set.
       def wsse_header
         wsse.respond_to?(:to_xml) ? wsse.to_xml : ""