diff --git a/.changeset/happy-eggs-shop.md b/.changeset/happy-eggs-shop.md
new file mode 100644
index 000000000000..0e13c7b40732
--- /dev/null
+++ b/.changeset/happy-eggs-shop.md
@@ -0,0 +1,5 @@
+---
+"@sveltejs/kit": patch
+---
+
+fix rest param type generation
diff --git a/packages/kit/src/core/sync/write_types.js b/packages/kit/src/core/sync/write_types.js
index fe0f2dabf8d4..881ec07c4b9b 100644
--- a/packages/kit/src/core/sync/write_types.js
+++ b/packages/kit/src/core/sync/write_types.js
@@ -29,7 +29,7 @@ export function write_types(config, manifest_data) {
 		/** @type {string[]} */
 		const params = [];
 
-		const pattern = /\[([^\]]+)\]/g;
+		const pattern = /\[(?:\.{3})?([^\]]+)\]/g;
 		let match;
 
 		while ((match = pattern.exec(key))) {