diff --git a/general/prog/python-modules.xml b/general/prog/python-modules.xml
index d05e3564b6..84fb4a8daf 100644
--- a/general/prog/python-modules.xml
+++ b/general/prog/python-modules.xml
@@ -494,7 +494,8 @@ make</userinput></screen>
 
       <para>
         <option>--disable-introspection</option>: Omit this switch if you have
-        installed <xref linkend="gobject-introspection"/>.
+        installed <xref linkend="gobject-introspection"/>. Note that it
+        conflicts with <xref linkend="pygobject3"/>.
       </para>
 
       <para>