diff --git a/pisi-spec.rng b/pisi-spec.rng
index ee89b631..cde2c740 100644
--- a/pisi-spec.rng
+++ b/pisi-spec.rng
@@ -1170,6 +1170,7 @@
                 <value>locale:ht</value>
                 <value>locale:hu</value>
                 <value>locale:hy</value>
+                <value>locale:ia</value>
                 <value>locale:id</value>
                 <value>locale:ig</value>
                 <value>locale:ik</value>