diff --git a/ChangeLog b/ChangeLog
index 34ea527f8f..feae7487b7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Jun  4 04:08:37 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm.c (core_hash_merge_kwd): should return the result hash, which
+	  may be converted from and differ from the given argument.
+	  [ruby-core:62921] [Bug #9898]
+
 Tue Jun  3 23:32:34 2014  Tanaka Akira  <akr@fsij.org>
 
 	* ruby.c (load_file_internal2): Extracted from load_file_internal.
diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index 5988905138..68dd8a91cf 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -452,6 +452,17 @@ class TestKeywordArguments < Test::Unit::TestCase
     assert_equal({a: 1}, h, bug9776)
   end
 
+  def test_splat_hash_conversion
+    bug9898 = '[ruby-core:62921] [Bug #9898]'
+
+    o = Object.new
+    def o.to_hash() { a: 1 } end
+    assert_equal({a: 1}, m1(**o) {|x| break x}, bug9898)
+    o2 = Object.new
+    def o2.to_hash() { b: 2 } end
+    assert_equal({a: 1, b: 2}, m1(**o, **o2) {|x| break x}, bug9898)
+  end
+
   def test_gced_object_in_stack
     bug8964 = '[ruby-dev:47729] [Bug #8964]'
     assert_normal_exit %q{
diff --git a/vm.c b/vm.c
index ea138cc862..52e1f070bf 100644
--- a/vm.c
+++ b/vm.c
@@ -2357,6 +2357,7 @@ core_hash_merge_kwd(int argc, VALUE *argv)
     hash = argv[0];
     kw = argv[argc-1];
     kw = rb_convert_type(kw, T_HASH, "Hash", "to_hash");
+    if (argc < 2) hash = kw;
     rb_hash_foreach(kw, argc < 2 ? kwcheck_i : kwmerge_i, hash);
     return hash;
 }