diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
index 05d2705604b..d5c1654b16e 100644
--- a/doc/src/sgml/plpgsql.sgml
+++ b/doc/src/sgml/plpgsql.sgml
@@ -4892,7 +4892,7 @@ $$ LANGUAGE plpgsql;
      to the local variable <varname>curtime</varname>, the
      <application>PL/pgSQL</application> interpreter casts this
      string to the <type>timestamp</type> type by calling the
-     <function>text_out</function> and <function>timestamp_in</function>
+     <function>textout</function> and <function>timestamp_in</function>
      functions for the conversion.  So, the computed time stamp is updated
      on each execution as the programmer expects.  Even though this
      happens to work as expected, it's not terribly efficient, so