diff --git a/lib/devise/hooks/lockable.rb b/lib/devise/hooks/lockable.rb
index 22d0428e..d713153f 100644
--- a/lib/devise/hooks/lockable.rb
+++ b/lib/devise/hooks/lockable.rb
@@ -2,6 +2,6 @@
 # This is only triggered when the user is explicitly set (with set_user)
 Warden::Manager.after_set_user :except => :fetch do |record, warden, options|
   if record.respond_to?(:failed_attempts) && warden.authenticated?(options[:scope])
-    record.update_attribute(:failed_attempts, 0)
+    record.update_attribute(:failed_attempts, 0) unless record.failed_attempts.zero?
   end
 end
diff --git a/lib/devise/models/rememberable.rb b/lib/devise/models/rememberable.rb
index b9e43386..ff6c2ee7 100644
--- a/lib/devise/models/rememberable.rb
+++ b/lib/devise/models/rememberable.rb
@@ -50,7 +50,7 @@ module Devise
       def remember_me!(extend_period=false)
         self.remember_token = self.class.remember_token if generate_remember_token?
         self.remember_created_at = Time.now.utc if generate_remember_timestamp?(extend_period)
-        save(:validate => false)
+        save(:validate => false) if self.changed?
       end
 
       # If the record is persisted, remove the remember token (but only if