diff --git a/xml/server.go b/xml/server.go
index ff25100..cbc760e 100644
--- a/xml/server.go
+++ b/xml/server.go
@@ -104,6 +104,16 @@ func (c *CodecRequest) WriteResponse(w http.ResponseWriter, response interface{}
 			fault.String += fmt.Sprintf(": %v", c.err)
 		}
 		xmlstr = fault2XML(fault)
+	} else if methodErr != nil {
+		var fault Fault
+		switch methodErr.(type) {
+		case Fault:
+			fault = methodErr.(Fault)
+		default:
+			fault = FaultApplicationError
+			fault.String += fmt.Sprintf(": %v", methodErr)
+		}
+		xmlstr = fault2XML(fault)
 	} else {
 		xmlstr, _ = rpcResponse2XML(response)
 	}