diff --git a/doc/src/sgml/func/func-info.sgml b/doc/src/sgml/func/func-info.sgml
index 80cf11083d6..f3e147c2d7d 100644
--- a/doc/src/sgml/func/func-info.sgml
+++ b/doc/src/sgml/func/func-info.sgml
@@ -3013,7 +3013,7 @@ acl      | {postgres=arwdDxtm/postgres,foo=r/postgres}
         </indexterm>
         <function>pg_get_multixact_stats</function> ()
         <returnvalue>record</returnvalue>
-        ( <parameter>num_mxids</parameter> <type>integer</type>,
+        ( <parameter>num_mxids</parameter> <type>bigint</type>,
           <parameter>num_members</parameter> <type>bigint</type>,
           <parameter>members_size</parameter> <type>bigint</type>,
           <parameter>oldest_multixact</parameter> <type>xid</type> )