diff --git a/lib/cancan/matchers.rb b/lib/cancan/matchers.rb
index a71c458..6c76c54 100644
--- a/lib/cancan/matchers.rb
+++ b/lib/cancan/matchers.rb
@@ -1,4 +1,5 @@
-Spec::Matchers.define :be_able_to do |*args|
+RSpec = Spec unless defined? RSpec # for RSpec 1 compatability
+RSpec::Matchers.define :be_able_to do |*args|
   match do |ability|
     ability.can?(*args)
   end