1 files changed, 1 insertions, 1 deletions
diff --git a/tlv11.h b/tlv11.h
index d85f1fa..301768e 100644
--- a/tlv11.h
+++ b/tlv11.h
@@ -20,7 +20,7 @@ struct list *copytlvlist(struct list *);
 void freetlvlist(struct list *);
 void rmtlv(struct list *, uint8_t);
 uint8_t *tlv2str(struct tlv *tlv);
-uint8_t *tlv2buf(uint8_t *, struct tlv *tlv);
+uint8_t *tlv2buf(uint8_t *, const struct tlv *tlv);
 
 /* Local Variables: */
 /* c-file-style: "stroustrup" */