diff --git a/bitbake/lib/bb/event.py b/bitbake/lib/bb/event.py
index 67cfceaf53..10eae5fde8 100644
--- a/bitbake/lib/bb/event.py
+++ b/bitbake/lib/bb/event.py
@@ -589,6 +589,16 @@ class PackageInfo(Event):
         Event.__init__(self)
         self._pkginfolist = pkginfolist
 
+class MetadataEvent(Event):
+    """
+    Generic event that target for OE-Core classes
+    to report information during asynchrous execution
+    """
+    def __init__(self, eventtype, eventdata):
+        Event.__init__(self)
+        self.type = eventtype
+        self.data = eventdata
+
 class SanityCheck(Event):
     """
     Event to issue sanity check
diff --git a/bitbake/lib/bb/ui/knotty.py b/bitbake/lib/bb/ui/knotty.py
index 0211b50aba..c1ee9f5269 100644
--- a/bitbake/lib/bb/ui/knotty.py
+++ b/bitbake/lib/bb/ui/knotty.py
@@ -477,6 +477,7 @@ def main(server, eventHandler, params, tf = TerminalFilter):
 
             # ignore
             if isinstance(event, (bb.event.BuildBase,
+                                  bb.event.MetadataEvent,
                                   bb.event.StampUpdate,
                                   bb.event.ConfigParsed,
                                   bb.event.RecipeParsed,