diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index f63a04c667..40f5459f1e 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -25891,7 +25891,8 @@ postgres=# SELECT * FROM pg_walfile_name_offset(pg_stop_backup());
         <indexterm>
          <primary>pg_create_logical_replication_slot</primary>
         </indexterm>
-        <function>pg_create_logical_replication_slot</function> ( <parameter>slot_name</parameter> <type>name</type>, <parameter>plugin</parameter> <type>name</type> <optional>, <parameter>temporary</parameter> <type>boolean</type>, <parameter>two_phase</parameter> <type>boolean</type> </optional> )
+        <function>pg_create_logical_replication_slot
+        </function> ( <parameter>slot_name</parameter> <type>name</type>, <parameter>plugin</parameter> <type>name</type> <optional>, <parameter>temporary</parameter> <type>boolean</type>, <parameter>two_phase</parameter> <type>boolean</type> </optional> )
         <returnvalue>record</returnvalue>
         ( <parameter>slot_name</parameter> <type>name</type>,
         <parameter>lsn</parameter> <type>pg_lsn</type> )
diff --git a/src/backend/catalog/system_functions.sql b/src/backend/catalog/system_functions.sql
index a416e94d37..26cd925ff6 100644
--- a/src/backend/catalog/system_functions.sql
+++ b/src/backend/catalog/system_functions.sql
@@ -451,7 +451,7 @@ AS 'pg_create_physical_replication_slot';
 CREATE OR REPLACE FUNCTION pg_create_logical_replication_slot(
     IN slot_name name, IN plugin name,
     IN temporary boolean DEFAULT false,
-    IN twophase boolean DEFAULT false,
+    IN two_phase boolean DEFAULT false,
     OUT slot_name name, OUT lsn pg_lsn)
 RETURNS RECORD
 LANGUAGE INTERNAL
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 79669bf5a2..f6ae1c4a5f 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -10703,7 +10703,7 @@
   proargtypes => 'name name bool bool',
   proallargtypes => '{name,name,bool,bool,name,pg_lsn}',
   proargmodes => '{i,i,i,i,o,o}',
-  proargnames => '{slot_name,plugin,temporary,twophase,slot_name,lsn}',
+  proargnames => '{slot_name,plugin,temporary,two_phase,slot_name,lsn}',
   prosrc => 'pg_create_logical_replication_slot' },
 { oid => '4222',
   descr => 'copy a logical replication slot, changing temporality and plugin',