diff --git a/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.cpp b/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.cpp
index 23eaf74f..2fdc3a4f 100644
--- a/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.cpp
+++ b/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.cpp
@@ -148,6 +148,8 @@ bool Sl_Inputs_Dx12::evaluateState(ID3D12Device* device)
 
 bool Sl_Inputs_Dx12::reportResource(const sl::ResourceTag& tag, ID3D12GraphicsCommandList* cmdBuffer, uint32_t frameId)
 {
+    std::scoped_lock lock(reportResourceMutex);
+
     if (!cmdBuffer)
         LOG_TRACE("cmdBuffer is null");
 
diff --git a/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.h b/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.h
index 6ed65bf4..d4ef70b2 100644
--- a/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.h
+++ b/OptiScaler/inputs/FG/Streamline_Inputs_Dx12.h
@@ -22,6 +22,7 @@ class Sl_Inputs_Dx12
     bool distortionFieldRequired = false;
 
     bool dispatched = false;
+    std::mutex reportResourceMutex {};
 
     uint32_t lastConstantsFrameId = UINT32_MAX;
     uint32_t lastPresentFrameId = 0;