diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 73979f20ff..44285ab393 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -24816,9 +24816,9 @@ SELECT * FROM pg_ls_dir('.') WITH ORDINALITY AS t(ls,n);
       <row>
        <entry role="func_table_entry"><para role="func_signature">
         <indexterm>
-         <primary>pg_postmaster_start_time</primary>
+         <primary>pg_postgres_start_time</primary>
         </indexterm>
-        <function>pg_postmaster_start_time</function> ()
+        <function>pg_postgres_start_time</function> ()
         <returnvalue>timestamp with time zone</returnvalue>
        </para>
        <para>
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index e00cd3c969..7b176a4970 100644
--- a/src/backend/utils/adt/timestamp.c
+++ b/src/backend/utils/adt/timestamp.c
@@ -49,7 +49,7 @@
 
 #define SAMESIGN(a,b)	(((a) < 0) == ((b) < 0))
 
-/* Set at postmaster start */
+/* Set at postgres start */
 TimestampTz PgStartTime;
 
 /* Set at configuration reload */
@@ -1623,7 +1623,7 @@ clock_timestamp(PG_FUNCTION_ARGS)
 }
 
 Datum
-pg_postmaster_start_time(PG_FUNCTION_ARGS)
+pg_postgres_start_time(PG_FUNCTION_ARGS)
 {
 	PG_RETURN_TIMESTAMPTZ(PgStartTime);
 }
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index f23321a41f..052dbe1548 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -8587,9 +8587,9 @@
 
 # start time function
 { oid => '2560', descr => 'postmaster start time',
-  proname => 'pg_postmaster_start_time', provolatile => 's',
+  proname => 'pg_postgres_start_time', provolatile => 's',
   prorettype => 'timestamptz', proargtypes => '',
-  prosrc => 'pg_postmaster_start_time' },
+  prosrc => 'pg_postgres_start_time' },
 
 # config reload time function
 { oid => '2034', descr => 'configuration load time',