--- a/src/devices/wifi/qsta-wifi-mac.cc	Wed Feb 03 20:34:52 2010 +0100
+++ b/src/devices/wifi/qsta-wifi-mac.cc	Wed Feb 03 20:34:53 2010 +0100
@@ -788,6 +788,7 @@
   edca->SetManager (m_dcfManager);
   edca->SetTypeOfStation (STA);
   edca->SetTxMiddle (m_txMiddle);
+  edca->CompleteConfig ();
   m_queues.insert (std::make_pair(ac, edca));
 }