diff --git a/atom/browser/ui/win/atom_desktop_native_widget_aura.h b/atom/browser/ui/win/atom_desktop_native_widget_aura.h
index 30da757ec18f..b5a6c0933d5b 100644
--- a/atom/browser/ui/win/atom_desktop_native_widget_aura.h
+++ b/atom/browser/ui/win/atom_desktop_native_widget_aura.h
@@ -12,7 +12,8 @@ namespace atom {
 
 class AtomDesktopNativeWidgetAura : public views::DesktopNativeWidgetAura {
  public:
-  AtomDesktopNativeWidgetAura(views::internal::NativeWidgetDelegate* delegate);
+  explicit AtomDesktopNativeWidgetAura(
+      views::internal::NativeWidgetDelegate* delegate);
 
   // internal::NativeWidgetPrivate:
   void Activate() override;