diff --git a/stdlib/html/parser.pyi b/stdlib/html/parser.pyi
index b49766bfc..82431b7e1 100644
--- a/stdlib/html/parser.pyi
+++ b/stdlib/html/parser.pyi
@@ -18,3 +18,13 @@ class HTMLParser(ParserBase):
     def handle_decl(self, decl: str) -> None: ...
     def handle_pi(self, data: str) -> None: ...
     def unknown_decl(self, data: str) -> None: ...
+    CDATA_CONTENT_ELEMENTS: Tuple[str, ...]
+    def check_for_whole_start_tag(self, i: int) -> int: ...  # undocumented
+    def clear_cdata_mode(self) -> None: ...  # undocumented
+    def goahead(self, end: bool) -> None: ...  # undocumented
+    def parse_bogus_comment(self, i: int, report: bool = ...) -> int: ...  # undocumented
+    def parse_endtag(self, i: int) -> int: ...  # undocumented
+    def parse_html_declaration(self, i: int) -> int: ...  # undocumented
+    def parse_pi(self, i: int) -> int: ...  # undocumented
+    def parse_starttag(self, i: int) -> int: ...  # undocumented
+    def set_cdata_mode(self, elem: str) -> None: ...  # undocumented