diff --git a/filter/source/msfilter/msdffimp.cxx b/filter/source/msfilter/msdffimp.cxx
index e32a7cc48600..8d740fe83aba 100644
--- a/filter/source/msfilter/msdffimp.cxx
+++ b/filter/source/msfilter/msdffimp.cxx
@@ -2404,7 +2404,7 @@ void DffPropertyReader::ApplyCustomShapeGeometryAttributes( SvStream& rIn, SfxIt
                 rIn.ReadUInt16( nNumElemVert ).ReadUInt16( nNumElemMemVert ).ReadUInt16( nElemSizeVert );
 
             bool bImport = false;
-            if (nNumElemVert)
+            if (nNumElemVert && nElemSizeVert)
             {
                 //sanity check that the stream is long enough to fulfill nNumElemVert * nElemSizeVert;
                 bImport = rIn.remainingSize() / nElemSizeVert >= nNumElemVert;