diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/BuiltInPermissionServices.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/BuiltInPermissionServices.kt
index 28a7d421e..7cd656046 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/BuiltInPermissionServices.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/BuiltInPermissionServices.kt
@@ -129,8 +129,8 @@ internal object BuiltInPermissionService : AbstractConcurrentPermissionService<P
                     ConcurrentHashMap()
                 )
 
-        public val grantedPermissionMap: MutableMap<PermissionId, List<PermissibleIdentifier>>
-                by value<MutableMap<PermissionId, List<PermissibleIdentifier>>>(ConcurrentHashMap())
+        public val grantedPermissionMap: MutableMap<PermissionId, MutableList<PermissibleIdentifier>>
+                by value<MutableMap<PermissionId, MutableList<PermissibleIdentifier>>>(ConcurrentHashMap())
                     .withDefault { CopyOnWriteArrayList() }
 
         public companion object {