diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index c4a42664f..2446e1dc2 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -28,6 +28,7 @@ Release 3-dev
 ### Bugs fixed
 
 - (lr-wpan) !1406 - Fixes issues during MAC scan
+- (wifi) #880 - Post-install change in WifiPhy::ChannelSettings does not completely reconfigure Wi-Fi
 
 Release 3.38
 ------------
diff --git a/src/wifi/model/channel-access-manager.cc b/src/wifi/model/channel-access-manager.cc
index d83a8783a..f380a1dd5 100644
--- a/src/wifi/model/channel-access-manager.cc
+++ b/src/wifi/model/channel-access-manager.cc
@@ -139,6 +139,13 @@ ChannelAccessManager::~ChannelAccessManager()
     m_phyListener = nullptr;
 }
 
+void
+ChannelAccessManager::DoInitialize()
+{
+    NS_LOG_FUNCTION(this);
+    InitLastBusyStructs();
+}
+
 void
 ChannelAccessManager::DoDispose()
 {
diff --git a/src/wifi/model/channel-access-manager.h b/src/wifi/model/channel-access-manager.h
index 42f924104..457c44e82 100644
--- a/src/wifi/model/channel-access-manager.h
+++ b/src/wifi/model/channel-access-manager.h
@@ -261,6 +261,7 @@ class ChannelAccessManager : public Object
     bool IsBusy() const;
 
   protected:
+    void DoInitialize() override;
     void DoDispose() override;
 
   private:
diff --git a/src/wifi/model/wifi-mac.cc b/src/wifi/model/wifi-mac.cc
index c5be46c4c..de270f8f8 100644
--- a/src/wifi/model/wifi-mac.cc
+++ b/src/wifi/model/wifi-mac.cc
@@ -363,6 +363,14 @@ WifiMac::DoInitialize()
     {
         it->second->Initialize();
     }
+
+    for (auto& link : m_links)
+    {
+        if (auto cam = link->channelAccessManager)
+        {
+            cam->Initialize();
+        }
+    }
 }
 
 void