diff --git a/.changeset/calm-pans-travel.md b/.changeset/calm-pans-travel.md
new file mode 100644
index 0000000000..18948da97a
--- /dev/null
+++ b/.changeset/calm-pans-travel.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: add TypeScript visitor overrides for TSModuleDeclaration and TSMappedType