--- a/src/spectrum/model/waveform-generator.cc	Fri Sep 30 14:25:23 2011 -0700
+++ b/src/spectrum/model/waveform-generator.cc	Tue Oct 04 18:40:50 2011 +0200
@@ -89,14 +89,14 @@
 
 
 
-Ptr<Object>
+Ptr<NetDevice>
 WaveformGenerator::GetDevice ()
 {
   return m_netDevice;
 }
 
 
-Ptr<Object>
+Ptr<MobilityModel>
 WaveformGenerator::GetMobility ()
 {
   return m_mobility;
@@ -111,14 +111,14 @@
 }
 
 void
-WaveformGenerator::SetDevice (Ptr<Object> d)
+WaveformGenerator::SetDevice (Ptr<NetDevice> d)
 {
   m_netDevice = d;
 }
 
 
 void
-WaveformGenerator::SetMobility (Ptr<Object> m)
+WaveformGenerator::SetMobility (Ptr<MobilityModel> m)
 {
   m_mobility = m;
 }