2 files changed, 16 insertions, 1 deletions
diff --git a/enum.c b/enum.c
index 233f56607c..6082daf27d 100644
--- a/enum.c
+++ b/enum.c
@@ -4704,7 +4704,7 @@ sum_iter(VALUE i, struct enum_sum_memo *memo)
     }
     else switch (TYPE(memo->v)) {
       default:      sum_iter_some_value(i, memo);    return;
-      case T_FLOAT: sum_iter_Kahan_Babuska(i, memo); return;
+      case T_FLOAT:
       case T_FIXNUM:
       case T_BIGNUM:
       case T_RATIONAL:
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 7599d43463..cd62cd8acb 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -1043,4 +1043,19 @@ class TestEnumerator < Test::Unit::TestCase
     assert_raise(FrozenError) { e.feed 1 }
     assert_raise(FrozenError) { e.rewind }
   end
+
+  def test_sum_of_numeric
+    num = Class.new(Numeric) do
+      attr_reader :to_f
+      def initialize(val)
+        @to_f = Float(val)
+      end
+    end
+
+    ary = [5, 10, 20].map {|i| num.new(i)}
+
+    assert_equal(35.0, ary.sum)
+    enum = ary.each
+    assert_equal(35.0, enum.sum)
+  end
 end