diff --git a/src/wifi/model/mac-low.cc b/src/wifi/model/mac-low.cc
index 7e4d9b491..d91d2c77b 100644
--- a/src/wifi/model/mac-low.cc
+++ b/src/wifi/model/mac-low.cc
@@ -3223,7 +3223,7 @@ MacLow::AggregateToAmpdu (Ptr<const Packet> packet, const WifiMacHeader hdr)
               newPacket->AddPacketTag (ampdutag);
 
               NS_LOG_DEBUG ("tx unicast VHT single MPDU with sequence number " << hdr.GetSequenceNumber ());
-              listenerIt->second->SetAmpdu (hdr.GetAddr2 (), true);
+              listenerIt->second->SetAmpdu (hdr.GetAddr1 (), true);
             }
         }
     }