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-rw-r--r--libc/stdio/stdio.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libc/stdio/stdio.c b/libc/stdio/stdio.c
index 60d4fe73b..1462874f0 100644
--- a/libc/stdio/stdio.c
+++ b/libc/stdio/stdio.c
@@ -643,6 +643,7 @@ static ssize_t oms_write(void *cookie, const char *buf, size_t bufsize)
if (COOKIE->pos > COOKIE->eof) {
*COOKIE->sizeloc = COOKIE->eof = COOKIE->pos;
+ COOKIE->buf[COOKIE->eof] = 0; /* Need to nul-terminate. */
}
return bufsize;