diff --git a/src/share/win_utf8_io/win_utf8_io.c b/src/share/win_utf8_io/win_utf8_io.c
index 2bf0c93..2f9914c 100644
--- a/src/share/win_utf8_io/win_utf8_io.c
+++ b/src/share/win_utf8_io/win_utf8_io.c
@@ -263,7 +263,7 @@ int vfprintf_utf8(FILE *stream, const char *format, va_list argptr)
 
 static int utf8_filename = 0;
 
-static void set_filename_utf8(int b)
+void set_filename_utf8(int b)
 {
 	utf8_filename = b ? 1: 0;
 }