diff --git a/data/language/countries/road_sign_languages.tsv b/data/language/countries/road_sign_languages.tsv
index bc6370b3..9a20c50a 100644
--- a/data/language/countries/road_sign_languages.tsv
+++ b/data/language/countries/road_sign_languages.tsv
@@ -43,6 +43,7 @@ kz	ru	1
 la	en	0
 la	fr	0
 li	de	1
+lk	si	1
 lk	en	0
 ls	en	1
 lu	fr	1