diff --git a/extensions/source/activex/main/SOActionsApproval.cpp b/extensions/source/activex/main/SOActionsApproval.cpp
index fd4abb1..c0da27f 100644
--- a/extensions/source/activex/main/SOActionsApproval.cpp
+++ b/extensions/source/activex/main/SOActionsApproval.cpp
@@ -5,6 +5,7 @@
 
 #include "so_activex.h"
 #include "SOActionsApproval.h"
+#include <sal/macros.h>
 
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -16,7 +17,7 @@ STDMETHODIMP SOActionsApproval::InterfaceSupportsErrorInfo(REFIID riid)
         &IID_ISOActionsApproval,
     };
 
-    for (int i=0;i<sizeof(arr)/sizeof(arr[0]);i++)
+    for (int i=0;i<SAL_N_ELEMENTS(arr);i++)
     {
 #if defined(_MSC_VER) && (_MSC_VER >= 1300)
         if (InlineIsEqualGUID(*arr[i],riid))
diff --git a/extensions/source/activex/main/SOComWindowPeer.cpp b/extensions/source/activex/main/SOComWindowPeer.cpp
index b6c0986..bf631a4 100644
--- a/extensions/source/activex/main/SOComWindowPeer.cpp
+++ b/extensions/source/activex/main/SOComWindowPeer.cpp
@@ -4,6 +4,7 @@
 #include "stdafx2.h"
 #include "so_activex.h"
 #include "SOComWindowPeer.h"
+#include <sal/macros.h>
 
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -15,7 +16,7 @@ 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 defined(_MSC_VER) && (_MSC_VER >= 1300)
         if (InlineIsEqualGUID(*arr[i],riid))
diff --git a/extensions/source/activex/main/SODispatchInterceptor.cpp b/extensions/source/activex/main/SODispatchInterceptor.cpp
index eadce51..704d2cd 100644
--- a/extensions/source/activex/main/SODispatchInterceptor.cpp
+++ b/extensions/source/activex/main/SODispatchInterceptor.cpp
@@ -7,6 +7,7 @@
 #include "SOActiveX.h"
 #include "SODispatchInterceptor.h"
 #include "com_uno_helper.h"
+#include <sal/macros.h>
 
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -18,7 +19,7 @@ STDMETHODIMP SODispatchInterceptor::InterfaceSupportsErrorInfo(REFIID riid)
         &IID_ISODispatchInterceptor,
     };
 
-    for (int i=0;i<sizeof(arr)/sizeof(arr[0]);i++)
+    for (int i=0;i< SAL_N_ELEMENTS(arr);i++)
     {
 #if defined(_MSC_VER) && (_MSC_VER >= 1300)
         if (InlineIsEqualGUID(*arr[i],riid))