diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index 1e4f26c13f6..85c50428a13 100644
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@@ -270,6 +270,12 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
       in a stored generated column is rewritten and all the future changes
       will apply the new generation expression.
      </para>
+
+     <para>
+      When this form is used, the column's statistics are removed,
+      so running <link linkend="sql-analyze"><command>ANALYZE</command></link>
+      on the table afterwards is recommended.
+     </para>
     </listitem>
    </varlistentry>