diff -r 79979375c165 src/devices/wimax/burst-profile-manager.cc
--- a/src/devices/wimax/burst-profile-manager.cc	Wed Jul 08 17:36:04 2009 +0200
+++ b/src/devices/wimax/burst-profile-manager.cc	Wed Jul 08 18:17:37 2009 +0200
@@ -117,7 +117,7 @@
     //burst profile got to be there in DCD/UCD, assuming always all profiles are defined in DCD/UCD
     NS_ASSERT(false);
 
-    return -1;
+    return ~0;
   }
 
   uint8_t
diff -r 79979375c165 src/devices/wimax/mac-messages.cc
--- a/src/devices/wimax/mac-messages.cc	Wed Jul 08 17:36:04 2009 +0200
+++ b/src/devices/wimax/mac-messages.cc	Wed Jul 08 18:17:37 2009 +0200
@@ -29,7 +29,7 @@
   NS_OBJECT_ENSURE_REGISTERED ( ManagementMessageType);
 
   ManagementMessageType::ManagementMessageType(void) :
-    m_type(-1)
+    m_type(~0)
   {
   }
 
diff -r 79979375c165 src/devices/wimax/packet-classifier.cc
--- a/src/devices/wimax/packet-classifier.cc	Wed Jul 08 17:36:04 2009 +0200
+++ b/src/devices/wimax/packet-classifier.cc	Wed Jul 08 18:17:37 2009 +0200
@@ -38,7 +38,7 @@
   }
 
   PacketClassifier::PacketClassifier(void) :
-    m_priority(-1)
+    m_priority(~0)
   {
   }
 
diff -r 79979375c165 src/devices/wimax/wimax-net-device.cc
--- a/src/devices/wimax/wimax-net-device.cc	Wed Jul 08 17:36:04 2009 +0200
+++ b/src/devices/wimax/wimax-net-device.cc	Wed Jul 08 18:17:37 2009 +0200
@@ -46,7 +46,7 @@
   NS_OBJECT_ENSURE_REGISTERED ( WimaxNetDevice);
 
   uint32_t WimaxNetDevice::m_nrFrames = 0;
-  uint8_t WimaxNetDevice::m_direction = -1;
+  uint8_t WimaxNetDevice::m_direction = ~0;
   Time WimaxNetDevice::m_frameStartTime = Seconds(0);
 
   TypeId