diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml
index e68d43227d7..d6d2ddeaacc 100644
--- a/doc/src/sgml/textsearch.sgml
+++ b/doc/src/sgml/textsearch.sgml
@@ -4049,11 +4049,6 @@ Parser: "pg_catalog.default"
      <para>The length of a <type>tsvector</type> (lexemes + positions) must be
      less than 1 megabyte</para>
     </listitem>
-    <listitem>
-     <!-- TODO: number of lexemes in what?  This is unclear -->
-     <para>The number of lexemes must be less than
-     2<superscript>64</superscript></para>
-    </listitem>
     <listitem>
      <para>Position values in <type>tsvector</type> must be greater than 0 and
      no more than 16,383</para>