diff --git a/include/wx/msw/ole/oleutils.h b/include/wx/msw/ole/oleutils.h
index 32abb05d86..8fb4279eae 100644
--- a/include/wx/msw/ole/oleutils.h
+++ b/include/wx/msw/ole/oleutils.h
@@ -140,10 +140,10 @@ private:
     wxAutoULong           m_cRef
 
 // macros for declaring supported interfaces
-// NB: you should write ADD_INTERFACE(Foo) and not ADD_INTERFACE(IID_IFoo)!
+// NB: ADD_IID prepends IID_I whereas ADD_RAW_IID does not
 #define BEGIN_IID_TABLE(cname)  const IID *cname::ms_aIids[] = {
 #define ADD_IID(iid)                                             &IID_I##iid,
-#define ADD_RAW_IID(iid)                                         &::iid,
+#define ADD_RAW_IID(iid)                                         &##iid,
 #define END_IID_TABLE                                          }
 
 // implementation is as straightforward as possible