--- a/etwist/http.py	Tue May 11 16:26:29 2010 +0200
+++ b/etwist/http.py	Tue May 11 16:48:26 2010 +0200
@@ -45,10 +45,11 @@
 
 
     def _finalize(self):
+        # we must set code before writing anything, else it's too late
+        if self._code is not None:
+            self._twreq.setResponseCode(self._code)
         if self._stream is not None:
             self._twreq.write(str(self._stream))
-        if self._code is not None:
-            self._twreq.setResponseCode(self._code)
         self._twreq.finish()
 
     def __repr__(self):