diff --git a/src/components/TypeArticle.vue b/src/components/TypeArticle.vue
index 04d4a692..7b8e9b39 100644
--- a/src/components/TypeArticle.vue
+++ b/src/components/TypeArticle.vue
@@ -130,6 +130,7 @@ let index = $ref(0)
 let input = $ref('')
 let wrong = $ref('')
 let isSpace = $ref(false)
+let isD = $ref(false)
 
 const currentIndex = computed(() => {
   return `${sectionIndex}${sentenceIndex}${wordIndex}`