diff --git a/doc/intro.txt b/doc/intro.txt
index 0103a7d1..21783fc7 100644
--- a/doc/intro.txt
+++ b/doc/intro.txt
@@ -134,7 +134,10 @@ Univ
 
 {4 Others}
 
-{!modules: CCFuture}
+{!modules:
+CCFuture
+CCLock
+}
 
 
 {2 Index}