diff --git a/ext/dom/lexbor/lexbor/html/parser.c b/ext/dom/lexbor/lexbor/html/parser.c
index cf72d1b8971..8ad05beb565 100644
--- a/ext/dom/lexbor/lexbor/html/parser.c
+++ b/ext/dom/lexbor/lexbor/html/parser.c
@@ -202,6 +202,7 @@ lxb_html_parse_fragment_chunk_begin(lxb_html_parser_t *parser,
     }
 
     lxb_html_tokenizer_set_state_by_tag(parser->tkz, doc->scripting, tag_id, ns);
+	lxb_html_tokenizer_tmp_tag_id_set(parser->tkz, LXB_TAG__UNDEF);
 
     parser->root = lxb_html_interface_create(new_doc, LXB_TAG_HTML, LXB_NS_HTML);
     if (parser->root == NULL) {