diff --git a/reactos/dll/win32/ole32/ole32.spec b/reactos/dll/win32/ole32/ole32.spec
index ce554435edb..bd1fa48e50d 100644
--- a/reactos/dll/win32/ole32/ole32.spec
+++ b/reactos/dll/win32/ole32/ole32.spec
@@ -57,7 +57,7 @@
 # CoGetProcessIdentifier
 @ stdcall CoGetStandardMarshal(ptr ptr long ptr long ptr)
 @ stdcall CoGetState(ptr)
-# CoGetStdMarshalEx
+@ stdcall -stub CoGetStdMarshalEx(ptr long ptr)
 # CoGetSystemSecurityPermissions
 @ stdcall CoGetTreatAsClass(ptr ptr)
 @ stdcall CoImpersonateClient()