diff --git a/src/wifi/model/ctrl-headers.cc b/src/wifi/model/ctrl-headers.cc
index 88e7c6c70..e36ce48dc 100644
--- a/src/wifi/model/ctrl-headers.cc
+++ b/src/wifi/model/ctrl-headers.cc
@@ -1547,17 +1547,22 @@ CtrlTriggerUserInfoField::SetMuRtsRuAllocation(uint8_t value)
     NS_ABORT_MSG_IF(m_triggerType != TriggerFrameType::MU_RTS_TRIGGER,
                     "SetMuRtsRuAllocation() can only be used for MU-RTS");
     NS_ABORT_MSG_IF(
-        value < 61 || value > 68,
+        value < 61 || value > 69,
         "Value "
             << +value
             << " is not admitted for B7-B1 of the RU Allocation subfield of MU-RTS Trigger Frames");
 
     m_ruAllocation = (value << 1);
-    if (value == 68)
+    if (value >= 68)
     {
-        // set B0 for 160 MHz and 80+80 MHz indication
+        // set B0 for 160 MHz, 80+80 MHz and 320 MHz indication
         m_ruAllocation++;
     }
+    if (value == 69)
+    {
+        // set 160 for 320 MHz indication
+        m_ps160 = true;
+    }
 }
 
 uint8_t
@@ -1567,7 +1572,7 @@ CtrlTriggerUserInfoField::GetMuRtsRuAllocation() const
                     "GetMuRtsRuAllocation() can only be used for MU-RTS");
     uint8_t value = (m_ruAllocation >> 1);
     NS_ABORT_MSG_IF(
-        value < 61 || value > 68,
+        value < 61 || value > 69,
         "Value "
             << +value
             << " is not admitted for B7-B1 of the RU Allocation subfield of MU-RTS Trigger Frames");
diff --git a/src/wifi/model/he/he-frame-exchange-manager.cc b/src/wifi/model/he/he-frame-exchange-manager.cc
index 52791ae26..90eb13e4a 100644
--- a/src/wifi/model/he/he-frame-exchange-manager.cc
+++ b/src/wifi/model/he/he-frame-exchange-manager.cc
@@ -1241,10 +1241,14 @@ HeFrameExchangeManager::GetCtsTxVectorAfterMuRts(const CtrlTriggerHeader& trigge
     {
         bw = MHz_u{80};
     }
+    else if (ru == 68)
+    {
+        bw = MHz_u{160};
+    }
     else
     {
-        NS_ASSERT(ru == 68);
-        bw = MHz_u{160};
+        NS_ASSERT(ru == 69);
+        bw = MHz_u{320};
     }
 
     auto txVector = GetWifiRemoteStationManager()->GetCtsTxVector(m_bssid, GetCtsModeAfterMuRts());
diff --git a/src/wifi/model/wifi-protection-manager.cc b/src/wifi/model/wifi-protection-manager.cc
index cf5939c99..7f1a5f3b6 100644
--- a/src/wifi/model/wifi-protection-manager.cc
+++ b/src/wifi/model/wifi-protection-manager.cc
@@ -85,11 +85,11 @@ WifiProtectionManager::AddUserInfoToMuRts(CtrlTriggerHeader& muRts,
     auto phy = m_mac->GetWifiPhy(m_linkId);
     std::size_t primaryIdx = phy->GetOperatingChannel().GetPrimaryChannelIndex(ctsTxWidth);
     std::size_t idx80MHz = MHz_u{80} / ctsTxWidth;
-    if ((phy->GetChannelWidth() == MHz_u{160}) && (ctsTxWidth <= MHz_u{40}) &&
+    if ((phy->GetChannelWidth() > MHz_u{80}) && (ctsTxWidth <= MHz_u{40}) &&
         (primaryIdx >= idx80MHz))
     {
-        // the primary80 is in the higher part of the 160 MHz channel
-        primaryIdx -= idx80MHz;
+        // get the index of the primary within the primary80
+        primaryIdx %= idx80MHz;
     }
     switch (static_cast<uint16_t>(ctsTxWidth))
     {
@@ -105,6 +105,9 @@ WifiProtectionManager::AddUserInfoToMuRts(CtrlTriggerHeader& muRts,
     case 160:
         ui.SetMuRtsRuAllocation(68);
         break;
+    case 320:
+        ui.SetMuRtsRuAllocation(69);
+        break;
     default:
         NS_ABORT_MSG("Unhandled TX width: " << ctsTxWidth << " MHz");
     }