diff --git a/examples/wireless/80211n-mimo.cc b/examples/wireless/80211n-mimo.cc
index 0c6e0b76f..697d9a6b2 100644
--- a/examples/wireless/80211n-mimo.cc
+++ b/examples/wireless/80211n-mimo.cc
@@ -159,8 +159,18 @@ int main (int argc, char *argv[])
               return 0;
             }
 
-          wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager","DataMode", StringValue (modes[i]),
-                                        "ControlMode", StringValue (modes[i]));
+          StringValue ctrlRate;
+          if (frequency == 2.4)
+            {
+                ctrlRate = StringValue ("ErpOfdmRate24Mbps");
+            }
+          else
+            {
+                ctrlRate = StringValue ("OfdmRate24Mbps");
+            }
+          wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
+                                        "DataMode", StringValue (modes[i]),
+                                        "ControlMode", ctrlRate);
 
           Ssid ssid = Ssid ("ns3-80211n");
 
diff --git a/src/wifi/model/mac-low.cc b/src/wifi/model/mac-low.cc
index 125248cd8..a74a3079e 100644
--- a/src/wifi/model/mac-low.cc
+++ b/src/wifi/model/mac-low.cc
@@ -517,7 +517,14 @@ MacLow::StartTransmission (Ptr<const Packet> packet,
   CancelAllEvents ();
   m_currentTxop = txop;
   m_txParams = params;
-  m_currentTxVector = GetDataTxVector (m_currentPacket, &m_currentHdr);
+  if (m_currentHdr.IsCtl ())
+    {
+      m_currentTxVector = GetRtsTxVector  (m_currentPacket, &m_currentHdr);
+    }
+  else
+    {
+      m_currentTxVector = GetDataTxVector (m_currentPacket, &m_currentHdr);
+    }
 
   if (NeedRts () && !IsCfPeriod ())
     {
diff --git a/src/wifi/model/wifi-remote-station-manager.cc b/src/wifi/model/wifi-remote-station-manager.cc
index 5f687ff3e..10d101546 100644
--- a/src/wifi/model/wifi-remote-station-manager.cc
+++ b/src/wifi/model/wifi-remote-station-manager.cc
@@ -653,7 +653,21 @@ WifiRemoteStationManager::GetRtsTxVector (Mac48Address address, const WifiMacHea
                                           Ptr<const Packet> packet)
 {
   NS_LOG_FUNCTION (this << address << *header << packet);
-  NS_ASSERT (!address.IsGroup ());
+  if (address.IsGroup ())
+    {
+        WifiMode mode = GetNonUnicastMode ();
+        WifiTxVector v;
+        v.SetMode (mode);
+        v.SetPreambleType (GetPreambleForTransmission (mode.GetModulationClass (), GetShortPreambleEnabled (), UseGreenfieldForDestination (address)));
+        v.SetTxPowerLevel (m_defaultTxPowerLevel);
+        v.SetChannelWidth (GetChannelWidthForTransmission (mode, m_wifiPhy->GetChannelWidth ()));
+        v.SetGuardInterval (ConvertGuardIntervalToNanoSeconds (mode, DynamicCast<WifiNetDevice> (m_wifiPhy->GetDevice ())));
+        v.SetNTx (1);
+        v.SetNss (1);
+        v.SetNess (0);
+        v.SetStbc (0);
+        return v;
+    }
   if (!IsLowLatency ())
     {
       HighLatencyRtsTxVectorTag rtstag;