--- oovbaapi/org/openoffice/excel/XCharacters.idl	
+++ oovbaapi/org/openoffice/excel/XCharacters.idl
@@ -7,14 +7,18 @@
 #ifndef __org_openoffice_excel_XFont_idl__
 #include <org/openoffice/excel/XFont.idl>
 #endif
-
+#ifndef __org_openoffice_vba_XHelperInterface_idl__
+#include <org/openoffice/vba/XHelperInterface.idl>
+#endif
 //=============================================================================
 
 module org {  module openoffice {  module excel { 
 
 //=============================================================================
-interface XCharacters: ::com::sun::star::uno::XInterface
+interface XCharacters
 {
+	interface ::org::openoffice::vba::XHelperInterface;
+
 	[attribute] string Caption;
 	[attribute, readonly ] long Count;
 	[attribute] string Text;
