diff --git a/proc.c b/proc.c
index e63b8469ac..558304fb7f 100644
--- a/proc.c
+++ b/proc.c
@@ -1557,7 +1557,7 @@ method_hash(VALUE method)
     hash = rb_hash_method_entry(hash, m->me);
     hash = rb_hash_end(hash);
 
-    return INT2FIX(hash);
+    return ST2FIX(hash);
 }
 
 /*
diff --git a/test/ruby/test_method.rb b/test/ruby/test_method.rb
index f313279f62..beffaa8ce0 100644
--- a/test/ruby/test_method.rb
+++ b/test/ruby/test_method.rb
@@ -197,6 +197,7 @@ class TestMethod < Test::Unit::TestCase
     def o.foo; end
     assert_kind_of(Integer, o.method(:foo).hash)
     assert_equal(Array.instance_method(:map).hash, Array.instance_method(:collect).hash)
+    assert_kind_of(String, o.method(:foo).hash.to_s)
   end
 
   def test_owner