diff --git a/files/lang/components_pl.ts b/files/lang/components_pl.ts
index fbfdf958ea..80316f7b3e 100644
--- a/files/lang/components_pl.ts
+++ b/files/lang/components_pl.ts
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE TS>
-<TS version="2.1" language="pl-PL">
+<TS version="2.1" language="pl_PL">
 <context>
     <name>ContentSelector</name>
     <message>