diff --git a/stepmania/src/archutils/Win32/GraphicsWindow.cpp b/stepmania/src/archutils/Win32/GraphicsWindow.cpp
index dacfd53746..b82aaf3e21 100644
--- a/stepmania/src/archutils/Win32/GraphicsWindow.cpp
+++ b/stepmania/src/archutils/Win32/GraphicsWindow.cpp
@@ -141,6 +141,11 @@ LRESULT CALLBACK GraphicsWindow::GraphicsWindow_WndProc( HWND hWnd, UINT msg, WP
 
 	case WM_WINDOWPOSCHANGED:
 	{
+		/* If we're fullscreen and don't have focus, our window is hidden, so GetClientRect
+		 * isn't meaningful. */
+		if( !g_CurrentParams.windowed && !g_bHasFocus )
+			break;
+
 		RECT rect;
 		GetClientRect( hWnd, &rect );