diff --git a/misc/package.dtd b/misc/package.dtd
index 46e895aba..83f508f31 100644
--- a/misc/package.dtd
+++ b/misc/package.dtd
@@ -61,7 +61,7 @@
   Multiple license elements can be specified. The license
   name points to a license text. -->
 <!ELEMENT licenses (license+)>
-<!ELEMENT license (#PCDATA?)> <!-- the license text, base64 encoded. -->
+<!ELEMENT license (#PCDATA)> <!-- the license text, base64 encoded. -->
 <!ATTLIST license
           name CDATA #REQUIRED
           enc (plain | base64) #REQUIRED>