diff --git a/enumerator.c b/enumerator.c
index cfc6a5dd98..9a0f9265c2 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -3345,7 +3345,7 @@ arith_seq_hash(VALUE self)
     hash = rb_hash_uint(hash, NUM2LONG(v));
     hash = rb_hash_end(hash);
 
-    return LONG2FIX(hash);
+    return ST2FIX(hash);
 }
 
 #define NUM_GE(x, y) RTEST(rb_num_coerce_relop((x), (y), idGE))
diff --git a/test/ruby/test_arithmetic_sequence.rb b/test/ruby/test_arithmetic_sequence.rb
index 5817631944..45a0ab9222 100644
--- a/test/ruby/test_arithmetic_sequence.rb
+++ b/test/ruby/test_arithmetic_sequence.rb
@@ -127,6 +127,7 @@ class TestArithmeticSequence < Test::Unit::TestCase
     assert_equal(seq.hash, seq.hash)
     assert_equal(seq.hash, 1.step.hash)
     assert_equal(seq.hash, 1.step(nil).hash)
+    assert_kind_of(String, seq.hash.to_s)
   end
 
   def test_first