1 files changed, 1 insertions, 1 deletions

diff --git a/lib/libc/stdio/ungetc.c b/lib/libc/stdio/ungetc.c
index 872abadc6817..f70fb425bb17 100644
--- a/lib/libc/stdio/ungetc.c
+++ b/lib/libc/stdio/ungetc.c
@@ -164,7 +164,7 @@ __ungetc(int c, FILE *fp)
 	 * Initially, we will use the `reserve' buffer.
 	 */
 	fp->_ur = fp->_r;
-	fp->_up = fp->_p;
+	fp->_extra->_up = fp->_p;
 	fp->_ub._base = fp->_ubuf;
 	fp->_ub._size = sizeof(fp->_ubuf);
 	fp->_ubuf[sizeof(fp->_ubuf) - 1] = c;