diff --git a/basis/calendar/calendar.factor b/basis/calendar/calendar.factor
index b7e93e56f9..d9284573c4 100755
--- a/basis/calendar/calendar.factor
+++ b/basis/calendar/calendar.factor
@@ -3,7 +3,7 @@
 USING: arrays kernel math math.functions namespaces sequences
 strings system vocabs.loader calendar.backend threads
 accessors combinators locals classes.tuple math.order
-memoize summary combinators.short-circuit alias ;
+memoize summary combinators.short-circuit ;
 IN: calendar
 
 TUPLE: duration