diff --git a/blob.c b/blob.c
index 003192e..3929ad3 100644
--- a/blob.c
+++ b/blob.c
@@ -80,6 +80,14 @@ blob_buf_init(struct blob_buf *buf, int id)
 	return 0;
 }
 
+void
+blob_buf_free(struct blob_buf *buf)
+{
+	free(buf->buf);
+	buf->buf = NULL;
+	buf->buflen = 0;
+}
+
 struct blob_attr *
 blob_new(struct blob_buf *buf, int id, int payload)
 {
diff --git a/blob.h b/blob.h
index 201f508..6e73093 100644
--- a/blob.h
+++ b/blob.h
@@ -214,6 +214,7 @@ blob_next(const struct blob_attr *attr)
 }
 
 extern int blob_buf_init(struct blob_buf *buf, int id);
+extern void blob_buf_free(struct blob_buf *buf);
 extern struct blob_attr *blob_new(struct blob_buf *buf, int id, int payload);
 extern void *blob_nest_start(struct blob_buf *buf, int id);
 extern void blob_nest_end(struct blob_buf *buf, void *cookie);