diff --git a/utils/pdfunite.cc b/utils/pdfunite.cc
index b35090c..d45f514 100644
--- a/utils/pdfunite.cc
+++ b/utils/pdfunite.cc
@@ -300,7 +300,7 @@ int main (int argc, char *argv[])
   ref.gen = 0;
   Dict *trailerDict = PDFDoc::createTrailerDict(objectsCount, gFalse, 0, &ref, yRef,
                                                 fileName, outStr->getPos());
-  PDFDoc::writeXRefTableTrailer(trailerDict, yRef, gFalse /* do not write unnecessary entries */,
+  PDFDoc::writeXRefTableTrailer(trailerDict, yRef, gTrue, // write all entries according to ISO 32000-1, 7.5.4 Cross-Reference Table: "For a file that has never been incrementally updated, the cross-reference section shall contain only one subsection, whose object numbering begins at 0."
                                 uxrefOffset, outStr, yRef);
   delete trailerDict;