diff --git a/tools/update_html b/tools/update_html
index a938cb03..42d977ff 100755
--- a/tools/update_html
+++ b/tools/update_html
@@ -64,6 +64,15 @@ do
   process $f
 done
 
+( cd browse-slack
+  ctags -x ../boot.subx ../[0-9]*.subx ../[0-9]*.mu *.mu > /tmp/tags
+)
+for f in browse-slack/*.mu
+do
+  test $# -gt 0  &&  test $1 != browse-slack/$f  &&  continue
+  process $f
+done
+
 ( cd linux
   ctags -x [0-9]*.subx [0-9]*.mu  > /tmp/tags
 )