diff --git a/.changeset/honest-suns-sleep.md b/.changeset/honest-suns-sleep.md
new file mode 100644
index 00000000..56209295
--- /dev/null
+++ b/.changeset/honest-suns-sleep.md
@@ -0,0 +1,5 @@
+---
+'@qwik.dev/partytown': patch
+---
+
+fix: initialise ErrorObject to Error instead of null to prevent instanceof crash