diff --git a/src/wifi/model/aparf-wifi-manager.cc b/src/wifi/model/aparf-wifi-manager.cc
index 700997074..f046e0a71 100644
--- a/src/wifi/model/aparf-wifi-manager.cc
+++ b/src/wifi/model/aparf-wifi-manager.cc
@@ -129,8 +129,8 @@ void
 AparfWifiManager::SetupPhy (const Ptr<WifiPhy> phy)
 {
   NS_LOG_FUNCTION (this << phy);
-  m_minPower = phy->GetTxPowerStart ();
-  m_maxPower = phy->GetTxPowerEnd ();
+  m_minPower = 0;
+  m_maxPower = phy->GetNTxPower () - 1;
   WifiRemoteStationManager::SetupPhy (phy);
 }
 
diff --git a/src/wifi/model/parf-wifi-manager.cc b/src/wifi/model/parf-wifi-manager.cc
index 3e8313e20..8681aef1c 100644
--- a/src/wifi/model/parf-wifi-manager.cc
+++ b/src/wifi/model/parf-wifi-manager.cc
@@ -97,8 +97,8 @@ void
 ParfWifiManager::SetupPhy (const Ptr<WifiPhy> phy)
 {
   NS_LOG_FUNCTION (this << phy);
-  m_minPower = phy->GetTxPowerStart ();
-  m_maxPower = phy->GetTxPowerEnd ();
+  m_minPower = 0;
+  m_maxPower = phy->GetNTxPower () - 1;
   WifiRemoteStationManager::SetupPhy (phy);
 }