--- a/src/devices/wifi/interference-helper.cc	Wed Jul 15 14:49:37 2009 +0200
+++ b/src/devices/wifi/interference-helper.cc	Wed Jul 15 14:59:44 2009 +0200
@@ -369,6 +369,9 @@
           case WIFI_PHY_STANDARD_80211_5Mhz: 
             symbolDurationUs = 16;
             break;
+          case WIFI_PHY_STANDARD_80211b:
+            NS_FATAL_ERROR("can't happen here");
+            symbolDurationUs = 0; // quiet compiler
           default:
             NS_FATAL_ERROR("unknown standard");
           }