diff --git a/sdk/include/psdk/propvarutil.h b/sdk/include/psdk/propvarutil.h
index ced51ec295f..0285cafbb4f 100644
--- a/sdk/include/psdk/propvarutil.h
+++ b/sdk/include/psdk/propvarutil.h
@@ -64,6 +64,7 @@ HRESULT WINAPI PropVariantChangeType(PROPVARIANT *ppropvarDest, REFPROPVARIANT p
 HRESULT WINAPI InitPropVariantFromGUIDAsString(REFGUID guid, PROPVARIANT *ppropvar);
 HRESULT WINAPI InitVariantFromGUIDAsString(REFGUID guid, VARIANT *pvar);
 HRESULT WINAPI InitPropVariantFromBuffer(const VOID *pv, UINT cb, PROPVARIANT *ppropvar);
+HRESULT WINAPI InitPropVariantFromCLSID(REFCLSID clsid, PROPVARIANT *ppropvar);
 HRESULT WINAPI InitVariantFromBuffer(const VOID *pv, UINT cb, VARIANT *pvar);
 HRESULT WINAPI PropVariantToGUID(const PROPVARIANT *ppropvar, GUID *guid);
 HRESULT WINAPI VariantToGUID(const VARIANT *pvar, GUID *guid);