diff --git a/docs/reference/ChangeLog b/docs/reference/ChangeLog
index 782da9fa2..6f74acb4f 100644
--- a/docs/reference/ChangeLog
+++ b/docs/reference/ChangeLog
@@ -1,6 +1,7 @@
 2006-04-05  Matthias Clasen  <mclasen@redhat.com>
 
 	* gobject/tmpl/signals.sgml: Document class_offset 0.
+	and that class_closure may be NULL.
 
 2006-04-04  Matthias Clasen  <mclasen@redhat.com>
 
diff --git a/docs/reference/gobject/tmpl/signals.sgml b/docs/reference/gobject/tmpl/signals.sgml
index f679d2365..ab14f40e6 100644
--- a/docs/reference/gobject/tmpl/signals.sgml
+++ b/docs/reference/gobject/tmpl/signals.sgml
@@ -282,7 +282,7 @@ See g_signal_new() for details on allowed signal names.
 @signal_flags: a combination of #GSignalFlags specifying detail of when 
    the default handler is to be invoked. You should at least specify 
    %G_SIGNAL_RUN_FIRST or %G_SIGNAL_RUN_LAST.
-@class_closure: The closure to invoke on signal emission.
+@class_closure: The closure to invoke on signal emission; may be %NULL.
 @accumulator: the accumulator for this signal; may be %NULL.
 @accu_data: user data for the @accumulator.
 @c_marshaller: the function to translate arrays of parameter values to 
@@ -308,7 +308,7 @@ See g_signal_new() for details on allowed signal names.
 @signal_flags: a combination of #GSignalFlags specifying detail of when 
    the default handler is to be invoked. You should at least specify 
    %G_SIGNAL_RUN_FIRST or %G_SIGNAL_RUN_LAST.
-@class_closure: The closure to invoke on signal emission.
+@class_closure: The closure to invoke on signal emission; may be %NULL.
 @accumulator: the accumulator for this signal; may be %NULL.
 @accu_data: user data for the @accumulator.
 @c_marshaller: the function to translate arrays of parameter values to