diff --git a/packages/backend/migration/1698931321665-add-comment.js b/packages/backend/migration/1698931321665-add-comment.js
new file mode 100644
index 0000000000..422de166e1
--- /dev/null
+++ b/packages/backend/migration/1698931321665-add-comment.js
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class AddComment1698931321665 {
+    name = 'AddComment1698931321665'
+
+    async up(queryRunner) {
+        await queryRunner.query(`COMMENT ON COLUMN "meta"."emailVerificationExpiresIn" IS 'The expiration time of email verification (unit: minute)'`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`COMMENT ON COLUMN "meta"."emailVerificationExpiresIn" IS NULL`);
+    }
+}
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index 538c4f003d..91a2495af2 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -176,6 +176,7 @@ export class MiMeta {
 
 	@Column('integer', {
 		default: 0,
+		comment: 'The expiration time of email verification (unit: minute)',
 	})
 	public emailVerificationExpiresIn: number;