diff --git a/hash.c b/hash.c
index 7e18a4049a..53d70f9fe7 100644
--- a/hash.c
+++ b/hash.c
@@ -1119,6 +1119,7 @@ rb_hash_reject(VALUE hash)
 
     RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
     ret = hash_alloc(rb_obj_class(hash));
+    OBJ_INFECT(ret, hash);
     if (!RHASH_EMPTY_P(hash)) {
 	rb_hash_foreach(hash, reject_i, ret);
     }
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 4244b86b56..0593785148 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -555,6 +555,8 @@ class TestHash < Test::Unit::TestCase
 
     assert_equal(h3, h.reject {|k,v| v })
     assert_equal(base, h)
+
+    assert_predicate(h.taint.reject {true}, :tainted?)
   end
 
   def test_reject!