diff --git a/app/models/user.rb b/app/models/user.rb
index 4c1cf6bc22f..38bb816a0d6 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -96,7 +96,7 @@ class User < ApplicationRecord
 
   before_save :guard_unconfirmed_email
 
-  after_save :remove_invalid_unconfirmed_emails
+  after_save :remove_invalid_unconfirmed_emails, :verify_default_admin!
 
   before_destroy do
     raise "Never destroy users!"
@@ -599,6 +599,16 @@ def remember_me
     true
   end
 
+  def verify_default_admin!
+    if is_initial_user?
+      Role.add_admin(self)
+    end
+  end
+
+  def is_initial_user?
+    User.count == 1
+  end
+
   private
 
   def clearable_fields