diff --git a/libqpdf/QPDFOutlineDocumentHelper.cc b/libqpdf/QPDFOutlineDocumentHelper.cc
index b736ff0..85aff76 100644
--- a/libqpdf/QPDFOutlineDocumentHelper.cc
+++ b/libqpdf/QPDFOutlineDocumentHelper.cc
@@ -106,7 +106,7 @@ QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name)
                 if (dests.isDictionary())
                 {
                     this->m->names_dest =
-                        new QPDFNameTreeObjectHelper(dests);
+                        new QPDFNameTreeObjectHelper(dests, this->qpdf);
                 }
             }
         }
diff --git a/libqpdf/QPDFPageLabelDocumentHelper.cc b/libqpdf/QPDFPageLabelDocumentHelper.cc
index 4be9073..9e374f2 100644
--- a/libqpdf/QPDFPageLabelDocumentHelper.cc
+++ b/libqpdf/QPDFPageLabelDocumentHelper.cc
@@ -17,7 +17,7 @@ QPDFPageLabelDocumentHelper::QPDFPageLabelDocumentHelper(QPDF& qpdf) :
     if (root.hasKey("/PageLabels"))
     {
         this->m->labels = new QPDFNumberTreeObjectHelper(
-            root.getKey("/PageLabels"));
+            root.getKey("/PageLabels"), this->qpdf);
     }
 }