diff --git a/ChangeLog b/ChangeLog
index 936939f3fc..263b39eaff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Sun Jun 21 05:31:41 2015  Shota Fukumori  <her@sorah.jp>
+
+	* ext/objspace/objspace_dump.c(dump_object): Return empty JSON object when
+	  passed object is a special const, instead of SEGV.
+	  Based patch by Kohei Suzuki (eagletmt). [ruby-core:69692] [Bug #11291]
+
+	* test/objspace/test_objspace.rb(test_dump_special_consts): Test for above fix.
+
+
 Sat Jun 20 03:56:58 2015  Yusuke Endoh  <mame@ruby-lang.org>
 
 	* enc/make_encmake.rb: the list of encoding extension libraries must
diff --git a/ext/objspace/objspace_dump.c b/ext/objspace/objspace_dump.c
index 7e082f96bb..4e4698868f 100644
--- a/ext/objspace/objspace_dump.c
+++ b/ext/objspace/objspace_dump.c
@@ -149,6 +149,11 @@ dump_object(VALUE obj, struct dump_config *dc)
     ID flags[RB_OBJ_GC_FLAGS_MAX];
     size_t n, i;
 
+    if (SPECIAL_CONST_P(obj)) {
+      dump_append(dc, "{}");
+      return;
+    }
+
     dc->cur_obj = obj;
     dc->cur_obj_references = 0;
     dc->cur_obj_klass = BUILTIN_TYPE(obj) == T_NODE ? 0 : RBASIC_CLASS(obj);
diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 0f0c904511..01f31cc784 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -243,6 +243,15 @@ class TestObjSpace < Test::Unit::TestCase
     assert_match /"method":"#{loc.base_label}"/, info
   end
 
+  def test_dump_special_consts
+    # [ruby-core:69692] [Bug #11291]
+    assert_equal('{}', ObjectSpace.dump(nil))
+    assert_equal('{}', ObjectSpace.dump(true))
+    assert_equal('{}', ObjectSpace.dump(false))
+    assert_equal('{}', ObjectSpace.dump(0))
+    assert_equal('{}', ObjectSpace.dump(:foo))
+  end
+
   def test_dump_all
     entry = /"bytesize":11, "value":"TEST STRING", "encoding":"UTF-8", "file":"-", "line":4, "method":"dump_my_heap_please", "generation":/