diff --git a/general/graphlib/libtiff.xml b/general/graphlib/libtiff.xml
index 21207d27bc..48735075c8 100644
--- a/general/graphlib/libtiff.xml
+++ b/general/graphlib/libtiff.xml
@@ -86,9 +86,8 @@
     <para role="optional">
       <xref linkend="freeglut"/> (required for <command>tiffgt</command>),
       <xref linkend="libjpeg"/>,
-      <xref linkend="libwebp"/>,
-      <ulink url="http://www.cl.cam.ac.uk/~mgk25/jbigkit/">JBIG-KIT</ulink>, and
-      <ulink url="https://facebook.github.io/zstd/">Zstd</ulink>
+      <xref linkend="libwebp"/>, and
+      <ulink url="http://www.cl.cam.ac.uk/~mgk25/jbigkit/">JBIG-KIT</ulink>
     </para>
 
     <para condition="html" role="usernotes">User Notes: