diff --git a/doc/stdenv.xml b/doc/stdenv.xml
index a0741c4aa225..afea416da8ac 100644
--- a/doc/stdenv.xml
+++ b/doc/stdenv.xml
@@ -1169,6 +1169,14 @@ echo @foo@
     every Haskell build input in it (TODO: how?).</para></listitem>
   </varlistentry>
 
+  <varlistentry>
+    <term>GStreamer</term>
+    <listitem><para>Adds the
+    GStreamer plugins subdirectory of
+    each build input to the <envar>GST_PLUGIN_SYSTEM_PATH_1_0</envar> or
+    <envar>GST_PLUGIN_SYSTEM_PATH</envar> environment variable.</para>
+  </varlistentry>
+
 </variablelist>
 
 </para>