diff --git a/libqpdf/QPDF_optimization.cc b/libqpdf/QPDF_optimization.cc
index 11a9040..6606e81 100644
--- a/libqpdf/QPDF_optimization.cc
+++ b/libqpdf/QPDF_optimization.cc
@@ -215,15 +215,13 @@ QPDF::pushInheritedAttributesToPageInternal(
             }
             // Remove this resource from this node.  It will be reattached at the page level.
             cur_pages.removeKey(key);
-        } else if (!((key == "/Type") || (key == "/Parent") || (key == "/Kids") ||
-                     (key == "/Count"))) {
+        } else if (!(key == "/Type" || key == "/Parent" || key == "/Kids" || key == "/Count")) {
             // Warn when flattening, but not if the key is at the top level (i.e. "/Parent" not
             // set), as we don't change these; but flattening removes intermediate /Pages nodes.
-            if ((warn_skipped_keys) && (cur_pages.hasKey("/Parent"))) {
-                m->objects.setLastObjectDescription("Pages object", cur_pages.getObjGen());
+            if (warn_skipped_keys && cur_pages.hasKey("/Parent")) {
                 warn(
                     qpdf_e_pages,
-                    m->last_object_description,
+                    "Pages object: object " + cur_pages.id_gen().unparse(' '),
                     0,
                     ("Unknown key " + key +
                      " in /Pages object is being discarded as a result of flattening the /Pages "
diff --git a/libqpdf/QPDF_pages.cc b/libqpdf/QPDF_pages.cc
index 18bd1c0..604387d 100644
--- a/libqpdf/QPDF_pages.cc
+++ b/libqpdf/QPDF_pages.cc
@@ -288,12 +288,10 @@ QPDF::insertPageobjToPage(QPDFObjectHandle const& obj, int pos, bool check_dupli
     if (check_duplicate) {
         if (!m->pageobj_to_pages_pos.insert(std::make_pair(og, pos)).second) {
             // The library never calls insertPageobjToPage in a way that causes this to happen.
-            m->objects.setLastObjectDescription(
-                "page " + std::to_string(pos) + " (numbered from zero)", og);
             throw QPDFExc(
                 qpdf_e_pages,
                 m->file->getName(),
-                m->last_object_description,
+                "page " + std::to_string(pos) + " (numbered from zero): object " + og.unparse(' '),
                 0,
                 "duplicate page reference found; this would cause loss of data");
         }
@@ -407,11 +405,10 @@ QPDF::findPage(QPDFObjGen og)
     flattenPagesTree();
     auto it = m->pageobj_to_pages_pos.find(og);
     if (it == m->pageobj_to_pages_pos.end()) {
-        m->objects.setLastObjectDescription("page object", og);
         throw QPDFExc(
             qpdf_e_pages,
             m->file->getName(),
-            m->last_object_description,
+            "page object: object " + og.unparse(' '),
             0,
             "page object not referenced in /Pages tree");
     }
diff --git a/libqpdf/qpdf/QPDF_private.hh b/libqpdf/qpdf/QPDF_private.hh
index be82f0a..5b44b1f 100644
--- a/libqpdf/qpdf/QPDF_private.hh
+++ b/libqpdf/qpdf/QPDF_private.hh
@@ -490,7 +490,6 @@ class QPDF::Doc
         std::shared_ptr<QPDFObject> getObjectForParser(int id, int gen, bool parse_pdf);
         std::shared_ptr<QPDFObject> getObjectForJSON(int id, int gen);
         size_t tableSize();
-        void setLastObjectDescription(std::string const& description, QPDFObjGen og);
 
         // For QPDFWriter:
 
@@ -541,6 +540,7 @@ class QPDF::Doc
         void resolveObjectsInStream(int obj_stream_number);
         bool isCached(QPDFObjGen og);
         bool isUnresolved(QPDFObjGen og);
+        void setLastObjectDescription(std::string const& description, QPDFObjGen og);
 
       private:
         QPDF& qpdf;