diff --git a/lib/libc/io/stdio/ringbuf.c b/lib/libc/io/stdio/ringbuf.c
index d336f8c..2115dc1 100644
--- a/lib/libc/io/stdio/ringbuf.c
+++ b/lib/libc/io/stdio/ringbuf.c
@@ -24,6 +24,7 @@ static int ringbuf_init(struct ringbuf *buf)
 		return ENOMEM;
 	}
 
+	memset(buf->buf_ptr, 0x0, buf->buf_max);
 	return SUCCESS;
 }