1 files changed, 2 insertions, 3 deletions

diff --git a/lib/libc/stdio/sprintf.c b/lib/libc/stdio/sprintf.c
index f49259f97ce7..aaaae5535d2c 100644
--- a/lib/libc/stdio/sprintf.c
+++ b/lib/libc/stdio/sprintf.c
@@ -47,14 +47,13 @@ sprintf(char * __restrict str, char const * __restrict fmt, ...)
 	int ret;
 	va_list ap;
 	FILE f;
-	struct __sFILEX ext;
 
 	f._file = -1;
 	f._flags = __SWR | __SSTR;
 	f._bf._base = f._p = (unsigned char *)str;
 	f._bf._size = f._w = INT_MAX;
-	f._extra = &ext;
-	INITEXTRA(&f);
+	f._orientation = 0;
+	memset(&f._mbstate, 0, sizeof(mbstate_t));
 	va_start(ap, fmt);
 	ret = __vfprintf(&f, fmt, ap);
 	va_end(ap);