timers.rb in timers-3.0.1

- old
+ new

@@ -1,7 +1,8 @@
 
 # Workaround for thread safety issues in SortedSet initialization
 # See: https://github.com/celluloid/timers/issues/20
+require 'set'
 SortedSet.new
 
 require 'timers/version'
 
 require 'timers/group'