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-rw-r--r--src/stdio/fmemopen.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stdio/fmemopen.c b/src/stdio/fmemopen.c
index fb2656e3..5e0eeb50 100644
--- a/src/stdio/fmemopen.c
+++ b/src/stdio/fmemopen.c
@@ -112,6 +112,7 @@ FILE *fmemopen(void *restrict buf, size_t size, const char *restrict mode)
if (!plus) f->f.flags = (*mode == 'r') ? F_NOWR : F_NORD;
if (*mode == 'r') f->c.len = size;
else if (*mode == 'a') f->c.len = f->c.pos = strnlen(buf, size);
+ else if (plus) *f->c.buf = 0;
f->f.read = mread;
f->f.write = mwrite;