diff --git a/.changeset/chatty-apples-flash.md b/.changeset/chatty-apples-flash.md
new file mode 100644
index 0000000000..fc689a003c
--- /dev/null
+++ b/.changeset/chatty-apples-flash.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: default params for html blocks
diff --git a/packages/svelte/src/internal/client/dom/blocks/html.js b/packages/svelte/src/internal/client/dom/blocks/html.js
index a39c4f537d..92c8243478 100644
--- a/packages/svelte/src/internal/client/dom/blocks/html.js
+++ b/packages/svelte/src/internal/client/dom/blocks/html.js
@@ -35,8 +35,8 @@ function check_hash(element, server_hash, value) {
 /**
  * @param {Element | Text | Comment} node
  * @param {() => string} get_value
- * @param {boolean} svg
- * @param {boolean} mathml
+ * @param {boolean} [svg]
+ * @param {boolean} [mathml]
  * @param {boolean} [skip_warning]
  * @returns {void}
  */