diff --git a/functions/gmp.xml b/functions/gmp.xml
index c7077f8d22..82eb99c4f9 100644
--- a/functions/gmp.xml
+++ b/functions/gmp.xml
@@ -1,4 +1,4 @@
-<!-- $Revision: 1.12 $ -->
+<!-- $Revision: 1.13 $ -->
  <reference id="ref.gmp">
   <title>GMP functions</title>
   <titleabbrev>GMP</titleabbrev>
@@ -757,7 +757,7 @@ print gmp_strval (fact (1000)) . "\n";
     </funcsynopsis>
     <para>
      Compute the
-     <ulink url="http://www.utm.edu/research/primes/glossary/LegendreSymbol.html">
+     <ulink url="&url.symbole-legendre;">
      Legendre symbol</ulink> of <parameter>a</parameter> and
      <parameter>p</parameter>. <parameter>p</parameter> should be odd
      and must be positive.