diff --git a/src/gui/wxgui/MainWindow.cpp b/src/gui/wxgui/MainWindow.cpp
index c0dd8724..7354d5a7 100644
--- a/src/gui/wxgui/MainWindow.cpp
+++ b/src/gui/wxgui/MainWindow.cpp
@@ -1386,8 +1386,8 @@ void MainWindow::OnMouseMove(wxMouseEvent& event)
 	auto renderCanvasMouse = m_render_canvas->ScreenToClient(m_mouse_position);
 	instance.SetMousePositionInRenderBox
 	({
-		static_cast<float>(renderCanvasMouse.x) / m_render_canvas->m_clientWidth,
-		static_cast<float>(renderCanvasMouse.y) / m_render_canvas->m_clientHeight,
+		static_cast<float>(renderCanvasMouse.x) / m_render_canvas->GetClientSize().GetWidth(),
+		static_cast<float>(renderCanvasMouse.y) / m_render_canvas->GetClientSize().GetHeight(),
 	});
 	lock.unlock();