diff --git a/src/wifi/model/ht/ht-frame-exchange-manager.cc b/src/wifi/model/ht/ht-frame-exchange-manager.cc
index 4bd7d5794..6e4c38cdf 100644
--- a/src/wifi/model/ht/ht-frame-exchange-manager.cc
+++ b/src/wifi/model/ht/ht-frame-exchange-manager.cc
@@ -313,7 +313,6 @@ HtFrameExchangeManager::CreateBlockAckAgreement (const MgtAddBaResponseHeader *r
     }
 
   m_agreements.insert ({{originator, tid}, agreement});
-  GetBaManager (tid)->SetBlockAckInactivityCallback (MakeCallback (&HtFrameExchangeManager::SendDelbaFrame, this));
 }
 
 void
diff --git a/src/wifi/model/ht/ht-frame-exchange-manager.h b/src/wifi/model/ht/ht-frame-exchange-manager.h
index bd0699ca7..76f8a0352 100644
--- a/src/wifi/model/ht/ht-frame-exchange-manager.h
+++ b/src/wifi/model/ht/ht-frame-exchange-manager.h
@@ -198,6 +198,16 @@ public:
    */
   BlockAckType GetBlockAckType (Mac48Address originator, uint8_t tid) const;
 
+  /**
+   * Sends DELBA frame to cancel a block ack agreement with STA
+   * addressed by <i>addr</i> for TID <i>tid</i>.
+   *
+   * \param addr address of the recipient.
+   * \param tid traffic ID.
+   * \param byOriginator flag to indicate whether this is set by the originator.
+   */
+  void SendDelbaFrame (Mac48Address addr, uint8_t tid, bool byOriginator);
+
 protected:
   void DoDispose () override;
 
@@ -334,16 +344,6 @@ protected:
   void SendAddBaRequest (Mac48Address recipient, uint8_t tid, uint16_t startingSeq,
                          uint16_t timeout, bool immediateBAck);
 
-  /**
-   * Sends DELBA frame to cancel a block ack agreement with STA
-   * addressed by <i>addr</i> for TID <i>tid</i>.
-   *
-   * \param addr address of the recipient.
-   * \param tid traffic ID.
-   * \param byOriginator flag to indicate whether this is set by the originator.
-   */
-  void SendDelbaFrame (Mac48Address addr, uint8_t tid, bool byOriginator);
-
   /**
    * Create a BlockAck frame with header equal to <i>blockAck</i> and start its transmission.
    *
diff --git a/src/wifi/model/wifi-mac.cc b/src/wifi/model/wifi-mac.cc
index fdc70cdff..e535dfd66 100644
--- a/src/wifi/model/wifi-mac.cc
+++ b/src/wifi/model/wifi-mac.cc
@@ -984,6 +984,11 @@ WifiMac::Receive (Ptr<WifiMacQueueItem> mpdu)
                 //and act by locally establishing the agreement on
                 //the appropriate queue.
                 GetQosTxop (respHdr.GetTid ())->GotAddBaResponse (&respHdr, from);
+                auto htFem = DynamicCast<HtFrameExchangeManager> (m_feManager);
+                if (htFem != 0)
+                  {
+                    GetQosTxop (respHdr.GetTid ())->GetBaManager ()->SetBlockAckInactivityCallback (MakeCallback (&HtFrameExchangeManager::SendDelbaFrame, htFem));
+                  }
                 //This frame is now completely dealt with, so we're done.
                 return;
               }