diff --git a/writerfilter/source/dmapper/PropertyMap.hxx b/writerfilter/source/dmapper/PropertyMap.hxx
index 7ec406053f07..b222c5d1508d 100644
--- a/writerfilter/source/dmapper/PropertyMap.hxx
+++ b/writerfilter/source/dmapper/PropertyMap.hxx
@@ -79,7 +79,7 @@ enum GrabBagType
     CHAR_GRAB_BAG
 };
 
-struct RedlineParams : public virtual SvRefBase
+struct RedlineParams : public SvRefBase
 {
     OUString  m_sAuthor;
     OUString  m_sDate;