--- a/backend/libosmscout/libosmscout/include/osmscout/util/Locale.h
+++ b/backend/libosmscout/libosmscout/include/osmscout/util/Locale.h
@@ -102,7 +102,7 @@
     }
 
   public:
-    static Locale ByEnvironment(std::locale locale = std::locale(""));
+    static Locale ByEnvironment(std::locale locale = std::locale());
   };
 }