diff --git a/odk/examples/OLE/activex/SOComWindowPeer.cpp b/odk/examples/OLE/activex/SOComWindowPeer.cpp
index 0b2fabf..1065a1b 100644
--- a/odk/examples/OLE/activex/SOComWindowPeer.cpp
+++ b/odk/examples/OLE/activex/SOComWindowPeer.cpp
@@ -38,6 +38,7 @@
 #include "stdafx2.h"
 #include "so_activex.h"
 #include "SOComWindowPeer.h"
+#include <sal/macros.h>
 
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -49,7 +50,7 @@ STDMETHODIMP SOComWindowPeer::InterfaceSupportsErrorInfo(REFIID riid)
         &IID_ISOComWindowPeer,
     };
 
-    for (int i=0;i<sizeof(arr)/sizeof(arr[0]);i++)
+    for (int i=0;i<SAL_N_ELEMENTS(arr);i++)
     {
         if (InlineIsEqualGUID(*arr[i],riid))
             return S_OK;