--- a/src/devices/wifi/wifi-mac.cc	Tue Sep 02 11:39:26 2008 -0700
+++ b/src/devices/wifi/wifi-mac.cc	Tue Sep 02 12:00:11 2008 -0700
@@ -79,7 +79,8 @@
                    MakeTimeChecker ())
     .AddAttribute ("AckTimeout", "When this timeout expires, the DATA/ACK handshake has failed.",
                    TimeValue (GetDefaultCtsAckTimeout ()),
-                   MakeTimeAccessor (&WifiMac::m_ackTimeout),
+                   MakeTimeAccessor (&WifiMac::GetAckTimeout,
+                                     &WifiMac::SetAckTimeout),
                    MakeTimeChecker ())
     .AddAttribute ("Sifs", "The value of the SIFS constant.",
                    TimeValue (GetDefaultSifs ()),
@@ -129,11 +130,6 @@
   m_ctsTimeout = ctsTimeout;
 }
 void 
-WifiMac::SetAckTimeout (Time ackTimeout)
-{
-  m_ackTimeout = ackTimeout;
-}
-void 
 WifiMac::SetMaxPropagationDelay (Time delay)
 {
   m_maxPropagationDelay = delay;
@@ -148,11 +144,6 @@
 {
   return m_ctsTimeout;
 }
-Time
-WifiMac::GetAckTimeout (void) const
-{
-  return m_ackTimeout;
-}
 
 Time
 WifiMac::GetMsduLifetime (void) const