diff --git a/app/controllers/alerts.rb b/app/controllers/alerts.rb
index b752ac3..e75ea6d 100644
--- a/app/controllers/alerts.rb
+++ b/app/controllers/alerts.rb
@@ -4,7 +4,7 @@
   @alert = Onduty::Alert.find(params[:id])
   halt 403 unless @alert.uid = params[:uid]
 
-  success_message = "The alert has been successfuly acknowledeged."
+  success_message = "The alert has been successfully acknowledeged."
   failure_message = "Error during alert acknowledgment."
 
   if ack = Onduty::Icinga.new.acknowledge_service(