diff --git a/server/models/avatar/avatar.ts b/server/models/avatar/avatar.ts
index 7a370bcd3..b40144592 100644
--- a/server/models/avatar/avatar.ts
+++ b/server/models/avatar/avatar.ts
@@ -24,7 +24,7 @@ export class AvatarModel extends Model<AvatarModel> {
   filename: string
 
   @AllowNull(true)
-  @Is('AvatarFileUrl', value => throwIfNotValid(value, isActivityPubUrlValid, 'fileUrl'))
+  @Is('AvatarFileUrl', value => throwIfNotValid(value, isActivityPubUrlValid, 'fileUrl', true))
   @Column
   fileUrl: string