diff --git a/traitsui/extras/demo.py b/traitsui/extras/demo.py
index a0e20bfed..6c80a367c 100644
--- a/traitsui/extras/demo.py
+++ b/traitsui/extras/demo.py
@@ -552,7 +552,7 @@ class DemoPath(DemoTreeNodeObject):
     path = Property(depends_on='parent.path,name')
 
     #: Description of what the demo does:
-    description = HTML()
+    description = Property(HTML, depends_on="_description")
 
     #: The base URL for links:
     base_url = Property(depends_on='path')