diff --git a/blob.c b/blob.c
index bd66d78..65adb13 100644
--- a/blob.c
+++ b/blob.c
@@ -105,6 +105,7 @@ blob_buf_free(struct blob_buf *buf)
 {
 	free(buf->buf);
 	buf->buf = NULL;
+	buf->head = NULL;
 	buf->buflen = 0;
 }