diff --git a/ChangeLog b/ChangeLog
index 418dff755c..ca2154f59f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Mar 29 22:26:55 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm_eval.c (rb_check_funcall_with_hook): also should call the
+	  given hook before returning Qundef when overridden respond_to?
+	  method returned false.  [ruby-core:73556] [Bug #12030]
+
 Tue Mar 29 22:08:36 2016  Kazuki Yamaguchi  <k@rhe.jp>
 
 	* compile.c (iseq_peephole_optimize): don't apply tailcall
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 6ee029722a..83c52a0c73 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1316,6 +1316,15 @@ class TestHash < Test::Unit::TestCase
     assert_equal({dug: [:foo, :bar]}, h.dig(:d, :foo, :bar))
   end
 
+  def test_dig_with_respond_to
+    bug12030 = '[ruby-core:73556] [Bug #12030]'
+    o = Object.new
+    def o.respond_to?(*args)
+      super
+    end
+    assert_raise(TypeError) {{foo: o}.dig(:foo, :foo)}
+  end
+
   def test_cmp
     h1 = {a:1, b:2}
     h2 = {a:1, b:2, c:3}
diff --git a/version.h b/version.h
index 3127df53ea..c887f51e21 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.0"
 #define RUBY_RELEASE_DATE "2016-03-29"
-#define RUBY_PATCHLEVEL 50
+#define RUBY_PATCHLEVEL 51
 
 #define RUBY_RELEASE_YEAR 2016
 #define RUBY_RELEASE_MONTH 3
diff --git a/vm_eval.c b/vm_eval.c
index 9c9f5fe705..ce95106fbb 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -478,8 +478,10 @@ rb_check_funcall_with_hook(VALUE recv, ID mid, int argc, const VALUE *argv,
     rb_thread_t *th = GET_THREAD();
     int respond = check_funcall_respond_to(th, klass, recv, mid);
 
-    if (!respond)
+    if (!respond) {
+	(*hook)(FALSE, recv, mid, argc, argv, arg);
 	return Qundef;
+    }
 
     me = rb_search_method_entry(recv, mid);
     if (!check_funcall_callable(th, me)) {