1 files changed, 4 insertions, 1 deletions
diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc
index 45bd1847..739ad7ce 100644
--- a/libqpdf/QPDF.cc
+++ b/libqpdf/QPDF.cc
@@ -1948,7 +1948,10 @@ void
 QPDF::replaceReserved(QPDFObjectHandle reserved, QPDFObjectHandle replacement)
 {
     QTC::TC("qpdf", "QPDF replaceReserved");
-    reserved.assertReserved();
+    auto tc = reserved.getTypeCode();
+    if (!(tc == ::ot_reserved || tc == ::ot_null)) {
+        throw std::logic_error("replaceReserved called with non-reserverd object");
+    }
     replaceObject(reserved.getObjGen(), replacement);
 }