--- src/lib/libc/stdio/vsscanf.c	2005/11/20 11:07:30	1.9
+++ src/lib/libc/stdio/vsscanf.c	2006/03/02 18:05:30	1.10
@@ -72,5 +72,6 @@ vsscanf(const char *str, const char *fmt
 	f.fl_mutex = PTHREAD_MUTEX_INITIALIZER;
 	f.fl_owner = NULL;
 	f.fl_count = 0;
+	memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
 	return (__svfscanf(&f, fmt, ap));
 }