diff --git a/Source/Core/VideoBackends/D3D/Render.cpp b/Source/Core/VideoBackends/D3D/Render.cpp
index 8311310fb1..183a4e16c3 100644
--- a/Source/Core/VideoBackends/D3D/Render.cpp
+++ b/Source/Core/VideoBackends/D3D/Render.cpp
@@ -938,7 +938,7 @@ void Renderer::SwapImpl(u32 xfbAddr, u32 fbWidth, u32 fbHeight,const EFBRectangl
 	SetWindowSize(fbWidth, fbHeight);
 
 	const bool windowResized = CheckForResize();
-	const bool fullscreen = g_ActiveConfig.bFullscreen;
+	const bool fullscreen = g_ActiveConfig.bFullscreen && !SConfig::GetInstance().m_LocalCoreStartupParameter.bRenderToMain;
 
 	bool fullscreen_changed = s_last_fullscreen_mode != fullscreen;