diff --git a/Source/Engine/Engine/Screen.cpp b/Source/Engine/Engine/Screen.cpp
index 402e5e312..11db5dd42 100644
--- a/Source/Engine/Engine/Screen.cpp
+++ b/Source/Engine/Engine/Screen.cpp
@@ -71,7 +71,8 @@ Vector2 Screen::ScreenToGameViewport(const Vector2& screenPos)
 #if USE_EDITOR
     return Editor::Managed->ScreenToGameViewport(screenPos);
 #else
-    return MainWindow ? MainWindow->ScreenToClient(screenPos) : Vector2::Minimum;
+    auto win = Engine::MainWindow;
+    return win ? win->ScreenToClient(screenPos) : Vector2::Minimum;
 #endif
 }
 
@@ -80,7 +81,8 @@ Vector2 Screen::GameViewportToScreen(const Vector2& viewportPos)
 #if USE_EDITOR
     return Editor::Managed->GameViewportToScreen(viewportPos);
 #else
-    return MainWindow ? MainWindow->ClientToScreen(viewportPos) : Vector2::Minimum;
+    auto win = Engine::MainWindow;
+    return win ? win->ClientToScreen(viewportPos) : Vector2::Minimum;
 #endif
 }