diff --git a/packages/frontend/src/components/MkFollowButton.vue b/packages/frontend/src/components/MkFollowButton.vue
index 636e61db8f4b..6a4081079c08 100644
--- a/packages/frontend/src/components/MkFollowButton.vue
+++ b/packages/frontend/src/components/MkFollowButton.vue
@@ -121,6 +121,8 @@ async function onClick() {
 				});
 				hasPendingFollowRequestFromYou.value = true;
 
+				if ($i == null) return;
+
 				claimAchievement('following1');
 
 				if ($i.followingCount >= 10) {