diff --git a/OptiScaler/dllmain.cpp b/OptiScaler/dllmain.cpp
index 9600b518..e1f6bc3f 100644
--- a/OptiScaler/dllmain.cpp
+++ b/OptiScaler/dllmain.cpp
@@ -2088,6 +2088,13 @@ BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserv
             FSR3FG::HookFSR3FGExeInputs();
         }
 
+        if (State::Instance().activeFgInput == FGInput::Upscaler &&
+            State::Instance().GameEngine == GameEngineType::Unity && !Config::Instance()->FGResourceFlip.has_value())
+        {
+            LOG_WARN("Unity detected with Upscaler input, but FGResourceFlip is not set. Enabling it");
+            Config::Instance()->FGResourceFlip.set_volatile_value(true);
+        }
+
         for (size_t i = 0; i < 300; i++)
         {
             State::Instance().frameTimes.push_back(0.0f);