diff --git a/sdk/include/psdk/msctf.idl b/sdk/include/psdk/msctf.idl
index 0b96faa02ca..01e944cf5df 100644
--- a/sdk/include/psdk/msctf.idl
+++ b/sdk/include/psdk/msctf.idl
@@ -1119,6 +1119,23 @@ interface ITfKeyEventSink : IUnknown
         [out] BOOL *pfEaten);
 }
 
+[
+  object,
+  local,
+  uuid(1cd4c13b-1c36-4191-a70a-7f3e611f367d),
+  pointer_default(unique)
+]
+interface ITfKeyTraceEventSink : IUnknown
+{
+    HRESULT OnKeyTraceDown(
+        [in] WPARAM wParam,
+        [in] LPARAM lParam);
+
+    HRESULT OnKeyTraceUp(
+        [in] WPARAM wParam,
+        [in] LPARAM lParam);
+}
+
 [
   object,
   local,