diff --git a/dtd/c3d2web.dtd b/dtd/c3d2web.dtd
index bf828ecfc..cb4d32470 100644
--- a/dtd/c3d2web.dtd
+++ b/dtd/c3d2web.dtd
@@ -64,5 +64,5 @@
 <!ELEMENT ul ((li)+)>
 <!ELEMENT ol ((li)+)>
 
-<!ELEMENT li %Inline;>
+<!ELEMENT li %Inline;|%Block;>