diff --git a/searx/data/locales.json b/searx/data/locales.json
index cb3da69cb..597323c54 100644
--- a/searx/data/locales.json
+++ b/searx/data/locales.json
@@ -16,7 +16,7 @@
     "eo": "Esperanto",
     "es": "Español (Spanish)",
     "et": "Eesti (Estonian)",
-    "eu": "Euskara (Basque)",
+    "eu-ES": "Euskara (Basque)",
     "fa-IR": "فارسی, ایران (Persian, Iran)",
     "fi": "Suomi (Finnish)",
     "fil": "Filipino",
@@ -68,4 +68,4 @@
     "fa-IR",
     "he"
   ]
-}
\ No newline at end of file
+}