diff --git a/xtask/codegen/src/markdown_kinds_src.rs b/xtask/codegen/src/markdown_kinds_src.rs
index eeef6eef2726..821292cde704 100644
--- a/xtask/codegen/src/markdown_kinds_src.rs
+++ b/xtask/codegen/src/markdown_kinds_src.rs
@@ -40,6 +40,7 @@ pub const MARKDOWN_KINDS_SRC: KindsSrc = KindsSrc {
         "MD_BLOCK_LIST",
         "MD_HASH_LIST",
         "MD_HASH",
+        "MD_HEADER",
         "MD_HEADER1",
         "MD_HEADER2",
         "MD_HEADER3",