diff --git a/src/wifi/model/mac-rx-middle.cc b/src/wifi/model/mac-rx-middle.cc
index a3deb0837..6fcc12803 100644
--- a/src/wifi/model/mac-rx-middle.cc
+++ b/src/wifi/model/mac-rx-middle.cc
@@ -296,7 +296,7 @@ MacRxMiddle::HandleFragments (Ptr<const Packet> packet, const WifiMacHeader *hdr
 }
 
 void
-MacRxMiddle::Receive (Ptr<WifiMpdu> mpdu, uint8_t linkId)
+MacRxMiddle::Receive (Ptr<const WifiMpdu> mpdu, uint8_t linkId)
 {
   NS_LOG_FUNCTION (*mpdu << +linkId);
   const WifiMacHeader* hdr = &mpdu->GetHeader ();
diff --git a/src/wifi/model/mac-rx-middle.h b/src/wifi/model/mac-rx-middle.h
index 13385cc3e..b8e64a349 100644
--- a/src/wifi/model/mac-rx-middle.h
+++ b/src/wifi/model/mac-rx-middle.h
@@ -62,7 +62,7 @@ public:
    * \param mpdu the MPDU
    * \param linkId the ID of the given link
    */
-  void Receive (Ptr<WifiMpdu> mpdu, uint8_t linkId);
+  void Receive (Ptr<const WifiMpdu> mpdu, uint8_t linkId);
 
 
 private: