diff --git a/ac97/ac97.c b/ac97/ac97.c
index 1ad14fc..2e65198 100644
--- a/ac97/ac97.c
+++ b/ac97/ac97.c
@@ -35,7 +35,7 @@ codec_probe(uint16_t (*codec_read)(uint8_t reg),
 {
     uint8_t  cur_reg = 0;
     uint16_t regs[64], *regp = regs;
-    char     buf[13];
+    char     buf[16];
     FILE    *f;
 
     /* Reset codec. */