diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index c2e42f31c0..c5469e4678 100644
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -4776,7 +4776,10 @@ SELECT * FROM pg_attribute
     standard comparison operators, like <literal>=</literal> and
     <literal>&gt;</literal>.  Two LSNs can be subtracted using the
     <literal>-</literal> operator; the result is the number of bytes separating
-    those write-ahead log locations.
+    those write-ahead log locations. Also the number of bytes can be added
+    into and substracted from LSN using the <literal>+</literal> and
+    <literal>-</literal> operators, respectively.
+
    </para>
   </sect1>
 
diff --git a/src/backend/utils/adt/pg_lsn.c b/src/backend/utils/adt/pg_lsn.c
index d9754a7778..e4bdad3ef7 100644
--- a/src/backend/utils/adt/pg_lsn.c
+++ b/src/backend/utils/adt/pg_lsn.c
@@ -248,3 +248,49 @@ pg_lsn_mi(PG_FUNCTION_ARGS)
 
 	return result;
 }
+
+/*
+ * Add the number of bytes to pg_lsn, giving a new pg_lsn.
+ * Must handle both positive and negative numbers of bytes.
+ */
+Datum
+pg_lsn_pli(PG_FUNCTION_ARGS)
+{
+	XLogRecPtr	lsn = PG_GETARG_LSN(0);
+	int64	nbytes = PG_GETARG_INT64(1);
+	XLogRecPtr	result;
+
+	result = lsn + nbytes;
+
+	/* Check for pg_lsn overflow */
+	if ((nbytes >= 0 && result < lsn) ||
+		(nbytes < 0 && result > lsn))
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+				 errmsg("pg_lsn out of range")));
+
+	PG_RETURN_LSN(result);
+}
+
+/*
+ * Substract the number of bytes from pg_lsn, giving a new pg_lsn.
+ * Must handle both positive and negative numbers of bytes.
+ */
+Datum
+pg_lsn_mii(PG_FUNCTION_ARGS)
+{
+	XLogRecPtr	lsn = PG_GETARG_LSN(0);
+	int64	nbytes = PG_GETARG_INT64(1);
+	XLogRecPtr	result;
+
+	result = lsn - nbytes;
+
+	/* Check for pg_lsn overflow */
+	if ((nbytes >= 0 && result > lsn) ||
+		(nbytes < 0 && result < lsn))
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+				 errmsg("pg_lsn out of range")));
+
+	PG_RETURN_LSN(result);
+}
diff --git a/src/include/catalog/pg_operator.dat b/src/include/catalog/pg_operator.dat
index 00ada7e48f..dc3dcc30c5 100644
--- a/src/include/catalog/pg_operator.dat
+++ b/src/include/catalog/pg_operator.dat
@@ -2909,6 +2909,12 @@
 { oid => '3228', descr => 'minus',
   oprname => '-', oprleft => 'pg_lsn', oprright => 'pg_lsn',
   oprresult => 'numeric', oprcode => 'pg_lsn_mi' },
+{ oid => '4179', descr => 'add',
+  oprname => '+', oprleft => 'pg_lsn', oprright => 'int8',
+  oprresult => 'pg_lsn', oprcode => 'pg_lsn_pli' },
+{ oid => '4180', descr => 'subtract',
+  oprname => '-', oprleft => 'pg_lsn', oprright => 'int8',
+  oprresult => 'pg_lsn', oprcode => 'pg_lsn_mii' },
 
 # enum operators
 { oid => '3516', descr => 'equal',
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 4bce3ad8de..198feddc91 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -8578,6 +8578,12 @@
 { oid => '4188', descr => 'smaller of two',
   proname => 'pg_lsn_smaller', prorettype => 'pg_lsn',
   proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_smaller' },
+{ oid => '4198',
+  proname => 'pg_lsn_pli', prorettype => 'pg_lsn',
+  proargtypes => 'pg_lsn int8', prosrc => 'pg_lsn_pli' },
+{ oid => '4199',
+  proname => 'pg_lsn_mii', prorettype => 'pg_lsn',
+  proargtypes => 'pg_lsn int8', prosrc => 'pg_lsn_mii' },
 
 # enum related procs
 { oid => '3504', descr => 'I/O',
diff --git a/src/test/regress/expected/pg_lsn.out b/src/test/regress/expected/pg_lsn.out
index 64d41dfdad..175b5dc9a7 100644
--- a/src/test/regress/expected/pg_lsn.out
+++ b/src/test/regress/expected/pg_lsn.out
@@ -71,6 +71,34 @@ SELECT '0/16AE7F8'::pg_lsn - '0/16AE7F7'::pg_lsn;
         1
 (1 row)
 
+SELECT '0/16AE7F7'::pg_lsn + 16::bigint;
+ ?column?  
+-----------
+ 0/16AE807
+(1 row)
+
+SELECT '0/16AE7F7'::pg_lsn - 16::bigint;
+ ?column?  
+-----------
+ 0/16AE7E7
+(1 row)
+
+SELECT 'FFFFFFFF/FFFFFFFE'::pg_lsn + 1::bigint;
+     ?column?      
+-------------------
+ FFFFFFFF/FFFFFFFF
+(1 row)
+
+SELECT 'FFFFFFFF/FFFFFFFE'::pg_lsn + 2::bigint; -- out of range error
+ERROR:  pg_lsn out of range
+SELECT '0/1'::pg_lsn - 1::bigint;
+ ?column? 
+----------
+ 0/0
+(1 row)
+
+SELECT '0/1'::pg_lsn - 2::bigint; -- out of range error
+ERROR:  pg_lsn out of range
 -- Check btree and hash opclasses
 EXPLAIN (COSTS OFF)
 SELECT DISTINCT (i || '/' || j)::pg_lsn f
diff --git a/src/test/regress/sql/pg_lsn.sql b/src/test/regress/sql/pg_lsn.sql
index 2c143c82ff..d64ac852c4 100644
--- a/src/test/regress/sql/pg_lsn.sql
+++ b/src/test/regress/sql/pg_lsn.sql
@@ -27,6 +27,12 @@ SELECT '0/16AE7F7' < '0/16AE7F8'::pg_lsn;
 SELECT '0/16AE7F8' > pg_lsn '0/16AE7F7';
 SELECT '0/16AE7F7'::pg_lsn - '0/16AE7F8'::pg_lsn;
 SELECT '0/16AE7F8'::pg_lsn - '0/16AE7F7'::pg_lsn;
+SELECT '0/16AE7F7'::pg_lsn + 16::bigint;
+SELECT '0/16AE7F7'::pg_lsn - 16::bigint;
+SELECT 'FFFFFFFF/FFFFFFFE'::pg_lsn + 1::bigint;
+SELECT 'FFFFFFFF/FFFFFFFE'::pg_lsn + 2::bigint; -- out of range error
+SELECT '0/1'::pg_lsn - 1::bigint;
+SELECT '0/1'::pg_lsn - 2::bigint; -- out of range error
 
 -- Check btree and hash opclasses
 EXPLAIN (COSTS OFF)