diff --git a/ChangeLog b/ChangeLog
index 0f6ed4fb9e..ca47a0786e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Sat Jan 23 20:10:29 2016  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* range.c (range_eqq): revert r11113 because rb_call_super() is
+	  called in range_include() and thus r11113 doesn't work when the
+	  receiver Range object consists of non linear objects such as Date
+	  objects.
+	  [ruby-core:72908] [Bug #12003]
+
 Sat Jan 23 18:37:37 2016  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* ChangeLog: Fixing wrong time on previous commit, and adding
diff --git a/range.c b/range.c
index 95b1b92053..ab3f1af9e2 100644
--- a/range.c
+++ b/range.c
@@ -23,7 +23,6 @@ static ID id_beg, id_end, id_excl, id_integer_p, id_div;
 #define id_succ idSucc
 
 static VALUE r_cover_p(VALUE, VALUE, VALUE, VALUE);
-static VALUE range_include(VALUE range, VALUE val);
 
 #define RANGE_BEG(r) (RSTRUCT(r)->as.ary[0])
 #define RANGE_END(r) (RSTRUCT(r)->as.ary[1])
@@ -1135,12 +1134,7 @@ range_inspect(VALUE range)
 static VALUE
 range_eqq(VALUE range, VALUE val)
 {
-    ID pred;
-    CONST_ID(pred, "include?");
-    if (rb_method_basic_definition_p(RBASIC_CLASS(range), pred)) {
-	return range_include(range, val);
-    }
-    return rb_funcall(range, pred, 1, val);
+    return rb_funcall(range, rb_intern("include?"), 1, val);
 }
 
 
diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index 046f69e9de..2fc2a2b1d3 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -314,6 +314,30 @@ class TestRange < Test::Unit::TestCase
     }
   end
 
+  def test_eqq_non_linear
+    bug12003 = '[ruby-core:72908] [Bug #12003]'
+    c = Class.new {
+      attr_reader :value
+
+      def initialize(value)
+        @value = value
+      end
+
+      def succ
+        self.class.new(@value.succ)
+      end
+
+      def ==(other)
+        @value == other.value
+      end
+
+      def <=>(other)
+        @value <=> other.value
+      end
+    }
+    assert_operator(c.new(0)..c.new(10), :===, c.new(5), bug12003)
+  end
+
   def test_include
     assert_include("a".."z", "c")
     assert_not_include("a".."z", "5")