diff --git a/src/lib/components/Accordion.svelte b/src/lib/components/Accordion.svelte
index 895cd2f9..62d531c9 100644
--- a/src/lib/components/Accordion.svelte
+++ b/src/lib/components/Accordion.svelte
@@ -29,6 +29,12 @@
     }
   }
 
+  // Sync with exported prop
+  $: if (inputEl && contentEl && inputEl.checked !== checked) {
+    inputEl.checked = checked;
+    toggleContent();
+  }
+
   function onTransitionEnd() {
     if (!inputEl.checked) {
       contentEl.style.display = 'none';