diff --git a/ChangeLog b/ChangeLog
index c49f0e938..2969ebdaf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2003-08-07  Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Documentation/GNUmakefile.postamble: Invoke Source/DocMakefile to
+	clean reference documentation.
+
 2003-08-02  Ludovic Marcotte <ludovic@Sophos.ca
 
 	* Modified NSPopUpButtonCell: -insertItemWithTitle: atIndex:
diff --git a/Documentation/GNUmakefile.postamble b/Documentation/GNUmakefile.postamble
index 8643c8304..911dc3110 100644
--- a/Documentation/GNUmakefile.postamble
+++ b/Documentation/GNUmakefile.postamble
@@ -64,7 +64,8 @@ after-uninstall::
 # before-clean::
 
 # Things to do after cleaning
-# after-clean::
+after-clean::
+	$(MAKE) -C ../Source -f DocMakefile clean
 
 # Things to do before distcleaning
 # before-distclean::