diff --git a/ChangeLog b/ChangeLog
index fe3af99..157e410 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2007-10-09  Simon McVittie  <simon.mcvittie@collabora.co.uk>
+
+	* doc/dbus-specification.xml: Specifically forbid empty structs (#7969)
+
 2007-09-20  Ryan Lortie  <desrt@desrt.ca>
 
 	Add argument path matching support.  Bug #11066.
diff --git a/doc/dbus-specification.xml b/doc/dbus-specification.xml
index 9e33944..ac98d1c 100644
--- a/doc/dbus-specification.xml
+++ b/doc/dbus-specification.xml
@@ -251,7 +251,12 @@
         but is useful in code that implements the protocol. This type code 
         is specified to allow such code to interoperate in non-protocol contexts.
       </para>
-      
+
+      <para>
+        Empty structures are not allowed; there must be at least one
+        type code between the parentheses.
+      </para>
+
       <para>
         <literal>ARRAY</literal> has ASCII character 'a' as type code. The array type code must be
         followed by a <firstterm>single complete type</firstterm>. The single