diff -r 52904cc0aa8a src/spectrum/model/aloha-noack-net-device.cc
--- a/src/spectrum/model/aloha-noack-net-device.cc	Thu Nov 17 18:11:07 2011 +0000
+++ b/src/spectrum/model/aloha-noack-net-device.cc	Mon Nov 28 20:30:50 2011 +0100
@@ -78,11 +78,6 @@
                    MakeUintegerAccessor (&AlohaNoackNetDevice::SetMtu,
                                          &AlohaNoackNetDevice::GetMtu),
                    MakeUintegerChecker<uint16_t> (1,65535))
-    .AddAttribute ("Phy", "The PHY layer attached to this device.",
-                   PointerValue (),
-                   MakePointerAccessor (&AlohaNoackNetDevice::GetPhy,
-                                        &AlohaNoackNetDevice::SetPhy),
-                   MakePointerChecker<Object> ())
     .AddTraceSource ("MacTx",
                      "Trace source indicating a packet has arrived for transmission by this device",
                      MakeTraceSourceAccessor (&AlohaNoackNetDevice::m_macTxTrace))
diff -r 52904cc0aa8a src/spectrum/model/non-communicating-net-device.cc
--- a/src/spectrum/model/non-communicating-net-device.cc	Thu Nov 17 18:11:07 2011 +0000
+++ b/src/spectrum/model/non-communicating-net-device.cc	Mon Nov 28 20:30:50 2011 +0100
@@ -44,11 +44,6 @@
   static TypeId tid = TypeId ("ns3::NonCommunicatingNetDevice")
     .SetParent<NetDevice> ()
     .AddConstructor<NonCommunicatingNetDevice> ()
-    .AddAttribute ("Phy", "The PHY layer attached to this device.",
-                   PointerValue (),
-                   MakePointerAccessor (&NonCommunicatingNetDevice::GetPhy,
-                                        &NonCommunicatingNetDevice::SetPhy),
-                   MakePointerChecker<Object> ())
   ;
   return tid;
 }