--- a/final/util/fstring.h
+++ b/final/util/fstring.h
@@ -292,9 +292,15 @@
     auto setNumber (lDouble, int = int(getPrecision<lDouble>())) -> FString&;
 
     template <typename NumT>
+#ifndef __ANDROID__
     auto setFormatedNumber (NumT, char = nl_langinfo(THOUSEP)[0]) -> FString&;
     auto setFormatedNumber (sInt64, char = nl_langinfo(THOUSEP)[0]) -> FString&;
     auto setFormatedNumber (uInt64, char = nl_langinfo(THOUSEP)[0]) -> FString&;
+#else
+    auto setFormatedNumber (NumT, char = '\0') -> FString&;
+    auto setFormatedNumber (sInt64, char = '\0') -> FString&;
+    auto setFormatedNumber (uInt64, char = '\0') -> FString&;
+#endif
 
     auto insert (const FString&, int) -> const FString&;
     auto insert (const FString&, std::size_t) -> const FString&;