diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index d830e0e47e..e910fbab01 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -5,7 +5,7 @@
ref="el"
v-hotkey="keymap"
:class="$style.root"
- :tabindex="!isDeleted ? '-1' : null"
+ :tabindex="!isDeleted ? '-1' : undefined"
>