diff --git a/bitbake/lib/bb/event.py b/bitbake/lib/bb/event.py
index 1169cbfb2b..67cfceaf53 100644
--- a/bitbake/lib/bb/event.py
+++ b/bitbake/lib/bb/event.py
@@ -237,7 +237,7 @@ class UIEventFilter(object):
                 return True
             return False
         eid = str(event.__class__)[8:-2]
-        if eid not in self.eventmask:
+        if self.eventmask and eid not in self.eventmask:
             return False
         return True