diff -ruN a/common/unicode/platform.h b/common/unicode/platform.h
--- a/common/unicode/platform.h	2020-10-28 23:21:12.000000000 +0200
+++ b/common/unicode/platform.h	2020-11-28 20:48:53.223629867 +0200
@@ -649,7 +649,7 @@
     /* Use the predefined value. */
 #elif U_PLATFORM_IS_LINUX_BASED || U_PLATFORM_IS_DARWIN_BASED || \
         U_PLATFORM == U_PF_EMSCRIPTEN
-#   define U_CHARSET_IS_UTF8 1
+#   define U_CHARSET_IS_UTF8 0
 #else
 #   define U_CHARSET_IS_UTF8 0
 #endif