diff --git a/openhtmltopdf-pdfbox/src/main/java/com/openhtmltopdf/pdfboxout/PdfBoxOutputDevice.java b/openhtmltopdf-pdfbox/src/main/java/com/openhtmltopdf/pdfboxout/PdfBoxOutputDevice.java
index f4a682481..12eac0fb6 100644
--- a/openhtmltopdf-pdfbox/src/main/java/com/openhtmltopdf/pdfboxout/PdfBoxOutputDevice.java
+++ b/openhtmltopdf-pdfbox/src/main/java/com/openhtmltopdf/pdfboxout/PdfBoxOutputDevice.java
@@ -1056,8 +1056,11 @@ private void writeOutline(RenderingContext c, Box root) {
         if (_bookmarks.size() > 0) {
             // TODO: .setViewerPreferences(PdfWriter.PageModeUseOutlines);
     
-            PDDocumentOutline outline = new PDDocumentOutline();
-            _writer.getDocumentCatalog().setDocumentOutline( outline );
+            PDDocumentOutline outline = _writer.getDocumentCatalog().getDocumentOutline();
+			if (outline == null) {
+                outline = new PDDocumentOutline();
+                _writer.getDocumentCatalog().setDocumentOutline(outline);
+            }
             
             writeBookmarks(c, root, outline, _bookmarks);
         }