1 files changed, 2 insertions, 0 deletions
diff --git a/lib/set.rb b/lib/set.rb
index 43c388ca90..bfa37d4dc0 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -569,6 +569,8 @@ class Set
     end
   end
 
+  alias to_s inspect
+
   def pretty_print(pp)  # :nodoc:
     pp.text sprintf('#<%s: {', self.class.name)
     pp.nest(1) {