diff --git a/mozilla/extensions/irc/locales/all-locales b/mozilla/extensions/irc/locales/all-locales
index 98ddef20e22..3a2bf2829b8 100644
--- a/mozilla/extensions/irc/locales/all-locales
+++ b/mozilla/extensions/irc/locales/all-locales
@@ -5,5 +5,6 @@ nb-NO
 fr
 pt-PT
 ru
+si
 sk
 sv-SE