--- a/src/devices/wifi/mac-low.cc	Tue Sep 02 12:06:46 2008 -0700
+++ b/src/devices/wifi/mac-low.cc	Tue Sep 02 12:13:24 2008 -0700
@@ -372,6 +372,11 @@
 {
   m_ctsTimeout = ctsTimeout;
 }
+void
+MacLow::SetSifs (Time sifs)
+{
+  m_sifs = sifs;
+}
 Mac48Address 
 MacLow::GetAddress (void) const
 {
@@ -387,6 +392,11 @@
 {
   return m_ctsTimeout;
 }
+Time
+MacLow::GetSifs (void) const
+{
+  return m_sifs;
+}
 
 void 
 MacLow::SetRxCallback (Callback<void,Ptr<Packet>,const WifiMacHeader *> callback)
@@ -642,11 +652,6 @@
   return cts.GetSize () + 4;
 }
 Time
-MacLow::GetSifs (void) const
-{
-  return m_mac->GetSifs ();
-}
-Time
 MacLow::GetSlotTime (void) const
 {
   return m_mac->GetSlot ();