diff --git a/.changeset/cool-insects-argue.md b/.changeset/cool-insects-argue.md
new file mode 100644
index 0000000000..ff1c520b7b
--- /dev/null
+++ b/.changeset/cool-insects-argue.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: preserve dirty status of deferred effects