diff --git a/ChangeLog b/ChangeLog
index 6ebe81628f..812ff2a49a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-23  Bruno Haible  <bruno@clisp.org>
+
+	idcache: Fix module description.
+	* modules/idcache (Include): Set to "idcache.h".
+
 2011-05-23  Paul Eggert  <eggert@cs.ucla.edu>
 
 	gnulib-tool: fix portability problem with MacOS sed
diff --git a/modules/idcache b/modules/idcache
index 2348641459..6334de2623 100644
--- a/modules/idcache
+++ b/modules/idcache
@@ -16,6 +16,7 @@ gl_IDCACHE
 Makefile.am:
 
 Include:
+"idcache.h"
 
 License:
 GPL