diff --git a/server/api/api/v1/instance/rules.test.ts b/server/api/api/v1/instance/rules.test.ts
index 64dbf6ca..44fe2004 100644
--- a/server/api/api/v1/instance/rules.test.ts
+++ b/server/api/api/v1/instance/rules.test.ts
@@ -17,6 +17,7 @@ describe(meta.route, () => {
             config.signups.rules.map((rule, index) => ({
                 id: String(index),
                 text: rule,
+                hint: "",
             })),
         );
     });
diff --git a/server/api/api/v1/instance/rules.ts b/server/api/api/v1/instance/rules.ts
index a26a31fc..07089cf7 100644
--- a/server/api/api/v1/instance/rules.ts
+++ b/server/api/api/v1/instance/rules.ts
@@ -20,6 +20,7 @@ export default apiRoute(async (req, matchedRoute, extraData) => {
         config.signups.rules.map((rule, index) => ({
             id: String(index),
             text: rule,
+            hint: "",
         })),
     );
 });
diff --git a/server/api/api/v2/instance/index.ts b/server/api/api/v2/instance/index.ts
index d4fac8b3..5d586c50 100644
--- a/server/api/api/v2/instance/index.ts
+++ b/server/api/api/v2/instance/index.ts
@@ -110,6 +110,7 @@ export default apiRoute(async (req, matchedRoute, extraData) => {
         rules: config.signups.rules.map((rule, index) => ({
             id: String(index),
             text: rule,
+            hint: "",
         })),
     });
 });