diff --git a/pisi-spec.rng b/pisi-spec.rng
index 4950caa8..72d5f685 100644
--- a/pisi-spec.rng
+++ b/pisi-spec.rng
@@ -1186,6 +1186,7 @@
                 <value>locale:mr</value>
                 <value>locale:ms</value>
                 <value>locale:mt</value>
+                <value>locale:my</value>
                 <value>locale:nb</value>
                 <value>locale:nds</value>
                 <value>locale:ne</value>