diff --git a/src/dawn_native/d3d12/DeviceD3D12.cpp b/src/dawn_native/d3d12/DeviceD3D12.cpp
index f49d843c99..a0318d85be 100644
--- a/src/dawn_native/d3d12/DeviceD3D12.cpp
+++ b/src/dawn_native/d3d12/DeviceD3D12.cpp
@@ -120,6 +120,10 @@ namespace dawn_native { namespace d3d12 {
         // Call Tick() again to clear them before releasing the allocator.
         mResourceAllocator->Tick(mCompletedSerial);
 
+        if (mFenceEvent != nullptr) {
+            ::CloseHandle(mFenceEvent);
+        }
+
         ASSERT(mUsedComObjectRefs.Empty());
         ASSERT(mPendingCommands.commandList == nullptr);
     }
diff --git a/src/dawn_native/d3d12/DeviceD3D12.h b/src/dawn_native/d3d12/DeviceD3D12.h
index 6af417accb..e45e8116be 100644
--- a/src/dawn_native/d3d12/DeviceD3D12.h
+++ b/src/dawn_native/d3d12/DeviceD3D12.h
@@ -107,7 +107,7 @@ namespace dawn_native { namespace d3d12 {
         Serial mCompletedSerial = 0;
         Serial mLastSubmittedSerial = 0;
         ComPtr<ID3D12Fence> mFence;
-        HANDLE mFenceEvent;
+        HANDLE mFenceEvent = nullptr;
 
         ComPtr<ID3D12Device> mD3d12Device;  // Device is owned by adapter and will not be outlived.
         ComPtr<ID3D12CommandQueue> mCommandQueue;