diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 3d703e5..d97893c 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -1387,6 +1387,19 @@ class TestRefinement < Test::Unit::TestCase
                    :foo, bug10826)
   end
 
+  def test_undef_original_method
+    assert_in_out_err([], <<-INPUT, ["NoMethodError"], [])
+      module NoPlus
+        refine String do
+          undef +
+        end
+      end
+
+      using NoPlus
+      "a" + "b" rescue p($!.class)
+    INPUT
+  end
+
   private
 
   def eval_using(mod, s)
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 02a4503..eb34119 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -1752,6 +1752,10 @@ vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
 			goto start_method_dispatch;
 		    }
 		}
+		else {
+		    ci->me = 0;
+		    goto start_method_dispatch;
+		}
 
 	      no_refinement_dispatch:
 		if (ci->me->def->body.orig_me) {