1 files changed, 1 insertions, 0 deletions
diff --git a/lib/mathn.rb b/lib/mathn.rb
index 1c68a4bb03..3e24dd03f3 100644
--- a/lib/mathn.rb
+++ b/lib/mathn.rb
@@ -101,6 +101,7 @@ class Prime
   alias next succ
 
   def each
+    return to_enum(:each) unless block_given?
     loop do
       yield succ
     end