diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index c72ec88acc..19d0657b0e 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -762,8 +762,7 @@ content::JavaScriptDialogManager* WebContents::GetJavaScriptDialogManager(
   return dialog_manager_.get();
 }
 
-void WebContents::OnAudioStateChanged(content::WebContents* web_contents,
-                                      bool audible) {
+void WebContents::OnAudioStateChanged(bool audible) {
   Emit("-audio-state-changed", audible);
 }
 
diff --git a/atom/browser/api/atom_api_web_contents.h b/atom/browser/api/atom_api_web_contents.h
index 034dc01545..55ff352f7d 100644
--- a/atom/browser/api/atom_api_web_contents.h
+++ b/atom/browser/api/atom_api_web_contents.h
@@ -358,8 +358,7 @@ class WebContents : public mate::TrackableObject<WebContents>,
       const content::BluetoothChooser::EventHandler& handler) override;
   content::JavaScriptDialogManager* GetJavaScriptDialogManager(
       content::WebContents* source) override;
-  void OnAudioStateChanged(content::WebContents* web_contents,
-                           bool audible) override;
+  void OnAudioStateChanged(bool audible) override;
 
   // content::WebContentsObserver:
   void BeforeUnloadFired(const base::TimeTicks& proceed_time) override;