diff --git a/doc/stdenv.xml b/doc/stdenv.xml
index f0cabe425a3d..a0741c4aa225 100644
--- a/doc/stdenv.xml
+++ b/doc/stdenv.xml
@@ -1156,6 +1156,13 @@ echo @foo@
     to Qt’s path.</para></listitem>
   </varlistentry>
 
+  <varlistentry>
+    <term>gdk-pixbuf</term>
+    <listitem><para>Exports <envvar>GDK_PIXBUF_MODULE_FILE</envvar>
+    environment variable the the builder. Add librsvg package
+    to <varname>buildInputs</varname> to get svg support.</para></listitem>
+  </varlistentry>
+
   <varlistentry>
     <term>GHC</term>
     <listitem><para>Creates a temporary package database and registers