diff --git a/ChangeLog b/ChangeLog
index 2adee2ba..46ae6706 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2021-02-21  Jay Berkenbilt  <ejb@ql.org>
 
+	* Add QPDFObjGen::unparse()
+
 	* Add QPDFObjectHandle::copyStream() for making a copy of a stream
 	within the same QPDF instance.
 
diff --git a/include/qpdf/QPDFObjGen.hh b/include/qpdf/QPDFObjGen.hh
index 892887b1..b3b46a97 100644
--- a/include/qpdf/QPDFObjGen.hh
+++ b/include/qpdf/QPDFObjGen.hh
@@ -43,6 +43,8 @@ class QPDFObjGen
     int getObj() const;
     QPDF_DLL
     int getGen() const;
+    QPDF_DLL
+    std::string unparse() const;
 
     QPDF_DLL
     friend std::ostream& operator<<(std::ostream&, const QPDFObjGen&);
diff --git a/libqpdf/QPDFObjGen.cc b/libqpdf/QPDFObjGen.cc
index a887720e..6f956239 100644
--- a/libqpdf/QPDFObjGen.cc
+++ b/libqpdf/QPDFObjGen.cc
@@ -1,4 +1,5 @@
 #include <qpdf/QPDFObjGen.hh>
+#include <qpdf/QUtil.hh>
 
 QPDFObjGen::QPDFObjGen() :
     obj(0),
@@ -42,3 +43,10 @@ std::ostream& operator<<(std::ostream& os, const QPDFObjGen& og)
     os << og.obj << "," << og.gen;
     return os;
 }
+
+std::string
+QPDFObjGen::unparse() const
+{
+    return QUtil::int_to_string(this->obj) + "," +
+        QUtil::int_to_string(this->gen);
+}