diff --git a/src/cascadia/WindowsTerminal/AppHost.h b/src/cascadia/WindowsTerminal/AppHost.h
index b3baf25bbc1..db32ad67106 100644
--- a/src/cascadia/WindowsTerminal/AppHost.h
+++ b/src/cascadia/WindowsTerminal/AppHost.h
@@ -44,7 +44,7 @@ class AppHost
     void _RaiseVisualBell(const winrt::Windows::Foundation::IInspectable& sender,
                           const winrt::Windows::Foundation::IInspectable& arg);
     void _WindowMouseWheeled(const til::point coord, const int32_t delta);
-    void _WindowActivated();
+    winrt::fire_and_forget _WindowActivated();
 
     void _DispatchCommandline(winrt::Windows::Foundation::IInspectable sender,
                               winrt::Microsoft::Terminal::Remoting::CommandlineArgs args);