diff --git a/menu/menu_hash.c b/menu/menu_hash.c
index 38fb5674fe..87f584f7aa 100644
--- a/menu/menu_hash.c
+++ b/menu/menu_hash.c
@@ -28,6 +28,7 @@
   * If you save this file as UTF-8, you'll break non-english characters
   * (e.g. German "Umlauts" and Portugese diacritics).
  */
+extern const char encoding_test[sizeof("ø")==2 ? 1 : -1];
 
 static const char *menu_hash_to_str_spanish(uint32_t hash)
 {