--- a/src/spectrum/model/half-duplex-ideal-phy.cc	Fri Sep 30 14:25:23 2011 -0700
+++ b/src/spectrum/model/half-duplex-ideal-phy.cc	Tue Oct 04 18:40:50 2011 +0200
@@ -126,7 +126,7 @@
 
 
 
-Ptr<Object>
+Ptr<NetDevice>
 HalfDuplexIdealPhy::GetDevice ()
 {
   NS_LOG_FUNCTION (this);
@@ -134,7 +134,7 @@
 }
 
 
-Ptr<Object>
+Ptr<MobilityModel>
 HalfDuplexIdealPhy::GetMobility ()
 {
   NS_LOG_FUNCTION (this);
@@ -143,7 +143,7 @@
 
 
 void
-HalfDuplexIdealPhy::SetDevice (Ptr<Object> d)
+HalfDuplexIdealPhy::SetDevice (Ptr<NetDevice> d)
 {
   NS_LOG_FUNCTION (this << d);
   m_netDevice = d;
@@ -151,7 +151,7 @@
 
 
 void
-HalfDuplexIdealPhy::SetMobility (Ptr<Object> m)
+HalfDuplexIdealPhy::SetMobility (Ptr<MobilityModel> m)
 {
   NS_LOG_FUNCTION (this << m);
   m_mobility = m;