diff --git a/py/qstrdefs.h b/py/qstrdefs.h
index ac106f9..9f00277 100644
--- a/py/qstrdefs.h
+++ b/py/qstrdefs.h
@@ -30,6 +30,7 @@
 Q(Ellipsis)
 Q(StopIteration)
 
+Q(BaseException)
 Q(AssertionError)
 Q(AttributeError)
 Q(ImportError)