diff --git a/pisi-spec.rng b/pisi-spec.rng
index 8366ab18..9b204c8d 100644
--- a/pisi-spec.rng
+++ b/pisi-spec.rng
@@ -265,6 +265,7 @@
                 <value>CS-1.0</value>
                 <value>Caldera</value>
                 <value>CeCILL-2</value>
+                <value>CeCILL-B</value>
                 <value>Cenon</value>
                 <value>Ciphire</value>
                 <value>Clarified-Artistic</value>