--- a/src/devices/csma/backoff.cc	Wed Jul 14 21:25:06 2010 +0200
+++ b/src/devices/csma/backoff.cc	Wed Jul 14 21:43:55 2010 +0200
@@ -67,7 +67,7 @@
 
   uint32_t backoffSlots = (uint32_t)m_rng.GetValue(minSlot, maxSlot);
 
-  backoff = backoffSlots * m_slotTime;
+  backoff = Scalar (backoffSlots) * m_slotTime;
   return (backoff);
 }