diff --git a/src/ComboBox/ComboBox.svelte b/src/ComboBox/ComboBox.svelte
index 4fe105fe..69b42adb 100644
--- a/src/ComboBox/ComboBox.svelte
+++ b/src/ComboBox/ComboBox.svelte
@@ -238,6 +238,7 @@
         on:blur="{({ relatedTarget }) => {
           if (!open || !relatedTarget) return;
           if (
+            relatedTarget &&
             !['INPUT', 'SELECT', 'TEXTAREA'].includes(relatedTarget.tagName) &&
             relatedTarget.getAttribute('role') !== 'button' &&
             relatedTarget.getAttribute('role') !== 'searchbox'