diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 1ec743a..7c3f358 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -1028,6 +1028,8 @@
 
 	taglist()		get list of matching tags
 	tagfiles()		get a list of tags files
+	gettagstack()		get the tag stack
+	settagstack()		modify the tag stack
 
 	luaeval()		evaluate Lua expression
 	mzeval()		evaluate |MzScheme| expression