diff --git a/src/runtime/components/navigation/Tabs.vue b/src/runtime/components/navigation/Tabs.vue
index b7f8611077..95bd9c678e 100644
--- a/src/runtime/components/navigation/Tabs.vue
+++ b/src/runtime/components/navigation/Tabs.vue
@@ -131,6 +131,7 @@ export default defineComponent({
 
     watch(() => props.modelValue, (value) => {
       selectedIndex.value = value
+      calcMarkerSize(value)
     })
 
     onMounted(() => calcMarkerSize(selectedIndex.value))