diff --git a/lib/bb/event.py b/lib/bb/event.py
index 0454c753..c81e79f7 100644
--- a/lib/bb/event.py
+++ b/lib/bb/event.py
@@ -764,7 +764,7 @@ class LogHandler(logging.Handler):
 class MetadataEvent(Event):
     """
     Generic event that target for OE-Core classes
-    to report information during asynchrous execution
+    to report information during asynchronous execution
     """
     def __init__(self, eventtype, eventdata):
         Event.__init__(self)