diff --git a/src/wifi/model/ideal-wifi-manager.cc b/src/wifi/model/ideal-wifi-manager.cc
index 87a16752c..f940e8136 100644
--- a/src/wifi/model/ideal-wifi-manager.cc
+++ b/src/wifi/model/ideal-wifi-manager.cc
@@ -123,7 +123,7 @@ IdealWifiManager::DoInitialize ()
       nModes = GetPhy ()->GetNMcs ();
       for (uint8_t i = 0; i < nModes; i++)
         {
-          for (uint16_t j = 20; j <= GetPhy ()->GetChannelWidth (); j *= 2)
+          for (uint8_t j = 20; j <= GetPhy ()->GetChannelWidth (); j *= 2)
             {
               txVector.SetChannelWidth (j);
               mode = GetPhy ()->GetMcs (i);
@@ -166,6 +166,10 @@ IdealWifiManager::DoInitialize ()
                       AddSnrThreshold (txVector, GetPhy ()->CalculateSnr (txVector, m_ber));
                     }
                 }
+              if (j == 160)
+                {
+                  break;
+                }
             }
         }
     }