diff --git a/po/pl.po b/po/pl.po
index c545d612ac..23531f5aed 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -4966,6 +4966,8 @@ msgid ""
 "A compressed file's name must end in <b>.[format].[compression]</b>. "
 "Example: <b>.sql.zip</b>"
 msgstr ""
+"Plik skompresowany musi mieć rozszerzenie <b>.[format].[kompresja]</b>, np. "
+"<b>.sql.zip</b>"
 
 #: libraries/display_import.lib.php:178
 msgid "File uploads are not allowed on this server."