diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/PermissionService.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/PermissionService.kt
index 0a6c39f89..32e3d57fd 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/PermissionService.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/permission/PermissionService.kt
@@ -155,7 +155,7 @@ public interface PermissionService<P : Permission> {
             reason: PluginPermissionIdRequestType
         ) = PermissionId(
             plugin.name.toLowerCase().replace(' ', '.'),
-            permissionName
+            permissionName.toLowerCase()
         )
 
         public fun PermissionId.findCorrespondingPermission(): Permission? = INSTANCE[this]