diff --git a/src/client/app/desktop/views/components/note-detail.vue b/src/client/app/desktop/views/components/note-detail.vue
index 50bbb769880a9315db7bc00d1602fbaa308b9524..b62a7cfd614a0341997659b1d00c501120f2d07c 100644
--- a/src/client/app/desktop/views/components/note-detail.vue
+++ b/src/client/app/desktop/views/components/note-detail.vue
@@ -2,7 +2,7 @@
 <div class="mk-note-detail" :title="title">
 	<button
 		class="read-more"
-		v-if="p.reply && p.reply.replyId && context == null"
+		v-if="p.reply && p.reply.replyId && context.length == 0"
 		title="会話をもっと読み込む"
 		@click="fetchContext"
 		:disabled="contextFetching"
diff --git a/src/client/app/mobile/views/components/note-detail.vue b/src/client/app/mobile/views/components/note-detail.vue
index c29e46e4543f5783a5c46b80dab407e4d9a69dad..7d2747751ebd441e5ff0ba75dd7532cde328e8e0 100644
--- a/src/client/app/mobile/views/components/note-detail.vue
+++ b/src/client/app/mobile/views/components/note-detail.vue
@@ -2,7 +2,7 @@
 <div class="mk-note-detail">
 	<button
 		class="more"
-		v-if="p.reply && p.reply.replyId && context == null"
+		v-if="p.reply && p.reply.replyId && context.length == 0"
 		@click="fetchContext"
 		:disabled="fetchingContext"
 	>