diff -r d21013536be3 src/devices/wifi/dcf-manager.cc
--- a/src/devices/wifi/dcf-manager.cc	Wed Sep 09 11:32:50 2009 +0100
+++ b/src/devices/wifi/dcf-manager.cc	Thu Sep 10 13:28:18 2009 +0400
@@ -435,15 +435,11 @@
   Time rxAccessStart;
   if (!m_rxing) 
     {
-      rxAccessStart = m_lastRxEnd;
+      rxAccessStart = m_lastRxEnd + m_sifs;
       if (!m_lastRxReceivedOk)
         {
           rxAccessStart += m_eifsNoDifs;
         }
-      else
-        {
-          rxAccessStart += m_sifs;
-        }
     } 
   else 
     {