diff --git a/packages/backend/src/services/following/create.ts b/packages/backend/src/services/following/create.ts
index 635d706fc5..61a8c6b268 100644
--- a/packages/backend/src/services/following/create.ts
+++ b/packages/backend/src/services/following/create.ts
@@ -209,12 +209,12 @@ export default async function (
 		await Blockings.delete(blocking.id);
 	} else {
 		// それ以外は単純に例外
-		if (blocking != null)
+		if (blocking)
 			throw new IdentifiableError(
 				"710e8fb0-b8c3-4922-be49-d5d93d8e6a6e",
 				"blocking",
 			);
-		if (blocked != null)
+		if (blocked)
 			throw new IdentifiableError(
 				"3338392a-f764-498d-8855-db939dcf8c48",
 				"blocked",
diff --git a/packages/backend/src/services/following/requests/create.ts b/packages/backend/src/services/following/requests/create.ts
index 0833f2aeb2..8b2e86ab5b 100644
--- a/packages/backend/src/services/following/requests/create.ts
+++ b/packages/backend/src/services/following/requests/create.ts
@@ -38,8 +38,8 @@ export default async function (
 		}),
 	]);
 
-	if (blocking != null) throw new Error("blocking");
-	if (blocked != null) throw new Error("blocked");
+	if (blocking) throw new Error("blocking");
+	if (blocked) throw new Error("blocked");
 
 	const followRequest = await FollowRequests.insert({
 		id: genId(),