diff --git a/appendices/dependencies.xml b/appendices/dependencies.xml
index 58406d1bb..8783e5277 100644
--- a/appendices/dependencies.xml
+++ b/appendices/dependencies.xml
@@ -3225,7 +3225,9 @@
       <segmentedlist id="zstd-optdeps">
         <segtitle>&external;</segtitle>
         <seglistitem>
-          <seg>None</seg>
+          <seg>
+            <ulink url="http://lz4.github.io/lz4/">LZ4</ulink>
+          </seg>
         </seglistitem>
       </segmentedlist>