diff --git a/src/wifi/model/eht/eht-ppdu.cc b/src/wifi/model/eht/eht-ppdu.cc
index 6dc48bfa7..675e8a3de 100644
--- a/src/wifi/model/eht/eht-ppdu.cc
+++ b/src/wifi/model/eht/eht-ppdu.cc
@@ -56,7 +56,7 @@ EhtPpdu::EhtPpdu(const WifiConstPsduMap& psdus,
 WifiPpduType
 EhtPpdu::GetType() const
 {
-    if (m_muUserInfos.empty())
+    if (m_psdus.count(SU_STA_ID) > 0)
     {
         return WIFI_PPDU_TYPE_SU;
     }
@@ -75,13 +75,13 @@ EhtPpdu::GetType() const
 bool
 EhtPpdu::IsDlMu() const
 {
-    return (m_preamble == WIFI_PREAMBLE_EHT_MU) && !m_muUserInfos.empty();
+    return (m_preamble == WIFI_PREAMBLE_EHT_MU) && (m_psdus.count(SU_STA_ID) == 0);
 }
 
 bool
 EhtPpdu::IsUlMu() const
 {
-    return (m_preamble == WIFI_PREAMBLE_EHT_TB) && !m_muUserInfos.empty();
+    return (m_preamble == WIFI_PREAMBLE_EHT_TB) && (m_psdus.count(SU_STA_ID) == 0);
 }
 
 void
@@ -99,13 +99,7 @@ EhtPpdu::SetTxVectorFromPhyHeaders(WifiTxVector& txVector,
     txVector.SetEhtPpduType(m_ehtPpduType); // FIXME: PPDU type should be read from U-SIG
     if (txVector.IsDlMu())
     {
-        auto copyTxVector = txVector;
-        for (const auto& muUserInfo : m_muUserInfos)
-        {
-            txVector.SetHeMuUserInfo(muUserInfo.first, muUserInfo.second);
-        }
-        SetHeMuUserInfos(copyTxVector, heSig);
-        NS_ASSERT(txVector.GetHeMuUserInfoMap() == copyTxVector.GetHeMuUserInfoMap());
+        SetHeMuUserInfos(txVector, heSig);
     }
     if (ns3::IsDlMu(m_preamble))
     {
diff --git a/src/wifi/model/he/he-ppdu.cc b/src/wifi/model/he/he-ppdu.cc
index de38d2cc3..5bfd47bd2 100644
--- a/src/wifi/model/he/he-ppdu.cc
+++ b/src/wifi/model/he/he-ppdu.cc
@@ -68,14 +68,6 @@ HePpdu::HePpdu(const WifiConstPsduMap& psdus,
     m_psdus.begin()->second = nullptr;
     m_psdus.clear();
     m_psdus = psdus;
-    if (txVector.IsMu())
-    {
-        for (const auto& heMuUserInfo : txVector.GetHeMuUserInfoMap())
-        {
-            auto [it, ret] = m_muUserInfos.emplace(heMuUserInfo);
-            NS_ABORT_MSG_IF(!ret, "STA-ID " << heMuUserInfo.first << " already present");
-        }
-    }
     SetPhyHeaders(txVector, ppduDuration);
 }
 
@@ -223,13 +215,7 @@ HePpdu::SetTxVectorFromPhyHeaders(WifiTxVector& txVector,
     }
     if (IsDlMu())
     {
-        auto copyTxVector = txVector;
-        for (const auto& muUserInfo : m_muUserInfos)
-        {
-            txVector.SetHeMuUserInfo(muUserInfo.first, muUserInfo.second);
-        }
-        SetHeMuUserInfos(copyTxVector, heSig);
-        NS_ASSERT(txVector.GetHeMuUserInfoMap() == copyTxVector.GetHeMuUserInfoMap());
+        SetHeMuUserInfos(txVector, heSig);
     }
     if (txVector.IsDlMu())
     {
diff --git a/src/wifi/model/he/he-ppdu.h b/src/wifi/model/he/he-ppdu.h
index 361e4d09d..4b053c4ea 100644
--- a/src/wifi/model/he/he-ppdu.h
+++ b/src/wifi/model/he/he-ppdu.h
@@ -383,9 +383,6 @@ class HePpdu : public OfdmPpdu
 #endif
     mutable TxPsdFlag m_txPsdFlag; //!< the transmit power spectral density flag
 
-    WifiTxVector::HeMuUserInfoMap m_muUserInfos; //!< HE MU specific per-user information (to be
-                                                 //!< removed once HE-SIG-B headers are implemented)
-
   private:
     std::string PrintPayload() const override;
     WifiTxVector DoGetTxVector() const override;