diff --git a/packages/hydrooj/src/model/builtin.ts b/packages/hydrooj/src/model/builtin.ts
index 991dda915..052f803ca 100644
--- a/packages/hydrooj/src/model/builtin.ts
+++ b/packages/hydrooj/src/model/builtin.ts
@@ -12,7 +12,7 @@ export const PERM = {
     // Domain Settings
     PERM_VIEW: 1n << 0n,
     PERM_EDIT_DOMAIN: 1n << 1n,
-    PREM_VIEW_DISPLAYNAME: 1n << 67n,
+    PERM_VIEW_DISPLAYNAME: 1n << 67n,
     PERM_MOD_BADGE: 1n << 2n,
 
     // Problem
@@ -104,7 +104,7 @@ export const Permission = (family: string, key: BigInt, desc: string) => ({ fami
 
 export const PERMS = [
     Permission('perm_general', PERM.PERM_VIEW, 'View this domain'),
-    Permission('perm_general', PERM.PREM_VIEW_DISPLAYNAME, 'View domain user displayname'),
+    Permission('perm_general', PERM.PERM_VIEW_DISPLAYNAME, 'View domain user displayname'),
     Permission('perm_general', PERM.PERM_EDIT_DOMAIN, 'Edit domain settings'),
     Permission('perm_general', PERM.PERM_MOD_BADGE, 'Show MOD badge'),
     Permission('perm_problem', PERM.PERM_CREATE_PROBLEM, 'Create problems'),
@@ -188,7 +188,7 @@ PERM.PERM_BASIC = PERM.PERM_VIEW
     | PERM.PERM_VIEW_RANKING;
 
 PERM.PERM_DEFAULT = PERM.PERM_VIEW
-    | PERM.PREM_VIEW_DISPLAYNAME
+    | PERM.PERM_VIEW_DISPLAYNAME
     | PERM.PERM_VIEW_PROBLEM
     | PERM.PERM_EDIT_PROBLEM_SELF
     | PERM.PERM_SUBMIT_PROBLEM
diff --git a/packages/hydrooj/src/service/layers/renderer.ts b/packages/hydrooj/src/service/layers/renderer.ts
index 64a0d3b0a..366ad5e80 100644
--- a/packages/hydrooj/src/service/layers/renderer.ts
+++ b/packages/hydrooj/src/service/layers/renderer.ts
@@ -16,7 +16,7 @@ export default (router, logger) => async (ctx: KoaContext, next) => {
         };
         const engine = global.Hydro.lib.template?.render
             || (() => JSON.stringify(args, serializer({
-                showDisplayName: user?.hasPerm(PERM.PREM_VIEW_DISPLAYNAME),
+                showDisplayName: user?.hasPerm(PERM.PERM_VIEW_DISPLAYNAME),
             })));
         return engine(templateName, {
             handler: ctx.handler,
diff --git a/packages/hydrooj/src/service/layers/response.ts b/packages/hydrooj/src/service/layers/response.ts
index 53f27d3ef..f71bf91c2 100644
--- a/packages/hydrooj/src/service/layers/response.ts
+++ b/packages/hydrooj/src/service/layers/response.ts
@@ -27,7 +27,7 @@ export default (logger) => async (ctx: KoaContext, next) => {
                         response.body.UiContext = UiContext;
                         response.body.UserContext = user;
                     }
-                    response.body = JSON.stringify(response.body, serializer({ showDisplayName: user?.hasPerm(PERM.PREM_VIEW_DISPLAYNAME) }));
+                    response.body = JSON.stringify(response.body, serializer({ showDisplayName: user?.hasPerm(PERM.PERM_VIEW_DISPLAYNAME) }));
                 } catch (e) {
                     response.body = new SystemError('Serialize failure', e.message);
                 }
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index bbba1700e..eb0e660f2 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -348,7 +348,7 @@ export class ConnectionHandler extends HandlerCommon {
 
     send(data: any) {
         this.conn.send(JSON.stringify(data, serializer({
-            showDisplayName: this.user?.hasPerm(PERM.PREM_VIEW_DISPLAYNAME),
+            showDisplayName: this.user?.hasPerm(PERM.PERM_VIEW_DISPLAYNAME),
         })));
     }
 
diff --git a/packages/hydrooj/src/upgrade.ts b/packages/hydrooj/src/upgrade.ts
index d2f07372e..5626397e5 100644
--- a/packages/hydrooj/src/upgrade.ts
+++ b/packages/hydrooj/src/upgrade.ts
@@ -436,7 +436,7 @@ const scripts: UpgradeScript[] = [
         return await iterateAllDomain(async (ddoc) => {
             for (const role of Object.keys(ddoc.roles)) {
                 if (['guest', 'root'].includes(role)) return;
-                ddoc.roles[role] = (BigInt(ddoc.roles[role]) | PERM.PREM_VIEW_DISPLAYNAME).toString();
+                ddoc.roles[role] = (BigInt(ddoc.roles[role]) | PERM.PERM_VIEW_DISPLAYNAME).toString();
             }
             await domain.setRoles(ddoc._id, ddoc.roles);
         });
diff --git a/packages/ui-default/templates/components/user.html b/packages/ui-default/templates/components/user.html
index 9e70f1cb7..6cbbeb1e5 100644
--- a/packages/ui-default/templates/components/user.html
+++ b/packages/ui-default/templates/components/user.html
@@ -5,7 +5,7 @@
     <img class="small user-profile-avatar v-center" loading="lazy" src="{{ avatarUrl(udoc.avatar|default('')) }}" width="20" height="20">
   {% endif %}
   <a class="user-profile-name" href="{{ url('user_detail', uid=udoc._id) }}">
-    {% if handler.user.hasPerm(perm.PREM_VIEW_DISPLAYNAME) and udoc.displayName and udoc.displayName != udoc.uname %}
+    {% if handler.user.hasPerm(perm.PERM_VIEW_DISPLAYNAME) and udoc.displayName and udoc.displayName != udoc.uname %}
       {{ udoc.displayName }} ({{ udoc.uname }})
     {% else %}
       {{ udoc.uname }}
diff --git a/packages/ui-default/templates/record_main_tr.html b/packages/ui-default/templates/record_main_tr.html
index dfe9b97f6..db02aac7e 100644
--- a/packages/ui-default/templates/record_main_tr.html
+++ b/packages/ui-default/templates/record_main_tr.html
@@ -28,7 +28,7 @@
   </td>
   <td class="col--submit-by">
     <a href="{{ url('user_detail', uid=rdoc.uid) }}">
-      {% if handler.user.hasPerm(perm.PREM_VIEW_DISPLAYNAME) and udoc.displayName %}
+      {% if handler.user.hasPerm(perm.PERM_VIEW_DISPLAYNAME) and udoc.displayName %}
         {{ udoc.displayName }} ({{ udoc.uname }})
       {% else %}
         {{ udoc.uname }}
diff --git a/packages/ui-default/templates/training_detail.html b/packages/ui-default/templates/training_detail.html
index 993854e94..495c998a5 100644
--- a/packages/ui-default/templates/training_detail.html
+++ b/packages/ui-default/templates/training_detail.html
@@ -18,12 +18,12 @@
         </li>
         <ul class="enroll_user_menu">
         {%- for uid, udoc in udict -%}
-        <li class="menu__item enroll_user_menu_item" data-uid="{{ uid }}" data-uname="{{ udoc.uname }}" {% if handler.user.hasPerm(perm.PREM_VIEW_DISPLAYNAME) and udoc.displayName %}data-displayname="{{ udoc.displayName }}"{% endif %}>
+        <li class="menu__item enroll_user_menu_item" data-uid="{{ uid }}" data-uname="{{ udoc.uname }}" {% if handler.user.hasPerm(perm.PERM_VIEW_DISPLAYNAME) and udoc.displayName %}data-displayname="{{ udoc.displayName }}"{% endif %}>
           <a href="./{{ tdoc._id }}?uid={{ uid }}" class="menu__link{% if (handler.request.query.uid or handler.user._id) == uid %} active{% endif %}">
             <span class="user-profile-link">
               <img class="small user-profile-avatar v-center" loading="lazy" src="{{ avatarUrl(udoc.avatar|default('')) }}" width="20" height="20">
               <span class="user-profile-name">
-                {% if handler.user.hasPerm(perm.PREM_VIEW_DISPLAYNAME) and udoc.displayName and udoc.displayName != udoc.uname %}
+                {% if handler.user.hasPerm(perm.PERM_VIEW_DISPLAYNAME) and udoc.displayName and udoc.displayName != udoc.uname %}
                   {{ udoc.displayName }} ({{ udoc.uname }})
                 {% else %}
                   {{ udoc.uname }}