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index 44c613f..716bdda 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # event
 
 Go event library to subscribe and fire events used to decouple the event
-source and sink in complex or ad-don based systems.
+source and sink in complex or add-on based systems.
 
 ```go
 // Custom event type