diff --git a/doc/contributing/coding-conventions.xml b/doc/contributing/coding-conventions.xml
index 799f1479467..fcb6501f615 100644
--- a/doc/contributing/coding-conventions.xml
+++ b/doc/contributing/coding-conventions.xml
@@ -620,6 +620,16 @@ args.stdenv.mkDerivation (args // {
          </para>
         </listitem>
        </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s an <emphasis>icon theme</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>data/icons</filename>
+         </para>
+        </listitem>
+       </varlistentry>
        <varlistentry>
         <term>
          If it’s related to <emphasis>SGML/XML processing</emphasis>:
@@ -652,6 +662,17 @@ args.stdenv.mkDerivation (args // {
          </variablelist>
         </listitem>
        </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>theme</emphasis> for a <emphasis>desktop environment</emphasis>,
+         a <emphasis>window manager</emphasis> or a <emphasis>display manager</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>data/themes</filename>
+         </para>
+        </listitem>
+       </varlistentry>
       </variablelist>
      </listitem>
     </varlistentry>