diff --git a/src/devices/wifi/ideal-mac-stations.cc b/src/devices/wifi/ideal-mac-stations.cc
index 0773ac339..e0d50b12e 100644
--- a/src/devices/wifi/ideal-mac-stations.cc
+++ b/src/devices/wifi/ideal-mac-stations.cc
@@ -67,7 +67,8 @@ IdealMacStations::AddModeSnrThreshold (WifiMode mode, double snr)
 }
 
 IdealMacStation::IdealMacStation (IdealMacStations *stations)
-  : m_stations (stations)
+  : m_stations (stations),
+    m_lastSnr (0.0)
 {}
 IdealMacStation::~IdealMacStation ()
 {}