diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
index 440b0e58770..2c32cbd5676 100644
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -8210,14 +8210,6 @@ int PQisthreadsafe();
    <application>libpq</application> source code for a way to do cooperative
    locking between <application>libpq</application> and your application.
   </para>
-
-  <para>
-   If you experience problems with threaded applications, run the program
-   in <filename>src/tools/thread</filename> to see if your platform has
-   thread-unsafe functions.  This program is run by
-   <filename>configure</filename>, but for binary distributions your
-   library might not match the library used to build the binaries.
-  </para>
  </sect1>