diff --git a/include/d3d10sdklayers.idl b/include/d3d10sdklayers.idl
index b5b0d031ae0..317f7c23e02 100644
--- a/include/d3d10sdklayers.idl
+++ b/include/d3d10sdklayers.idl
@@ -614,6 +614,20 @@ interface ID3D10Debug : IUnknown
     HRESULT Validate();
 }
 
+[
+    local,
+    object,
+    uuid(9b7e4e02-342c-4106-a19f-4f2704f689f0),
+    pointer_default(unique)
+]
+interface ID3D10SwitchToRef : IUnknown
+{
+    BOOL SetUseRef(
+        [in] BOOL useref
+    );
+    BOOL GetUseRef();
+}
+
 [
     local,
     object,