diff --git a/src/cascadia/TerminalControl/TermControl.h b/src/cascadia/TerminalControl/TermControl.h
index 5a229fb066b7..0fedb4162ff1 100644
--- a/src/cascadia/TerminalControl/TermControl.h
+++ b/src/cascadia/TerminalControl/TermControl.h
@@ -156,7 +156,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
         void _ApplyUISettings();
         void _InitializeBackgroundBrush();
         void _BackgroundColorChanged(const uint32_t color);
-        void _InitializeTerminal();
+        bool _InitializeTerminal();
         void _UpdateFont(const bool initialUpdate = false);
         void _KeyDownHandler(Windows::Foundation::IInspectable const& sender, Windows::UI::Xaml::Input::KeyRoutedEventArgs const& e);
         void _CharacterHandler(Windows::Foundation::IInspectable const& sender, Windows::UI::Xaml::Input::CharacterReceivedRoutedEventArgs const& e);
diff --git a/src/cascadia/WindowsTerminal/AppHost.cpp b/src/cascadia/WindowsTerminal/AppHost.cpp
index 7710575c764a..5e1b819f0347 100644
--- a/src/cascadia/WindowsTerminal/AppHost.cpp
+++ b/src/cascadia/WindowsTerminal/AppHost.cpp
@@ -205,9 +205,9 @@ void AppHost::_HandleCreateWindow(const HWND hwnd, RECT proposedRect, winrt::Ter
 
 		// Get the size of a window we'd need to host that client rect. This will
 		// add the titlebar space.
-		const auto client2win = _window->GetClientToWinSizeDelta(dpix);
-		adjustedHeight = clientRect.bottom - clientRect.top + client2win.cx;
-		adjustedWidth = clientRect.right - clientRect.left + client2win.cy;
+        const auto nonClientSize = _window->GetNonClientSize(dpix);
+        adjustedHeight = clientRect.bottom - clientRect.top + nonClientSize.cx;
+        adjustedWidth = clientRect.right - clientRect.left + nonClientSize.cy;
 	}
 
     const COORD origin{ gsl::narrow<short>(proposedRect.left),
diff --git a/src/cascadia/WindowsTerminal/IslandWindow.h b/src/cascadia/WindowsTerminal/IslandWindow.h
index 7c865b1f095d..61a9085cf121 100644
--- a/src/cascadia/WindowsTerminal/IslandWindow.h
+++ b/src/cascadia/WindowsTerminal/IslandWindow.h
@@ -33,7 +33,7 @@ class IslandWindow :
 
     virtual void Initialize();
 
-    void SetCreateCallback(std::function<void(const HWND, const RECT)> pfn) noexcept;
+    void SetCreateCallback(std::function<void(const HWND, const RECT, winrt::TerminalApp::LaunchMode& launchMode)> pfn) noexcept;
     void SetSnapDimensionCallback(std::function<float(bool widthOrHeight, float dimension)> pfn) noexcept;
 
     void UpdateTheme(const winrt::Windows::UI::Xaml::ElementTheme& requestedTheme);