diff --git a/eval.c b/eval.c
index 2cdc88a..0b155a1 100644
--- a/eval.c
+++ b/eval.c
@@ -1291,6 +1291,68 @@ rb_mod_refinements(VALUE module)
     return result;
 }
 
+static int
+used_refinements_i(VALUE _, VALUE mod, VALUE ary)
+{
+    ID id_defined_at;
+    CONST_ID(id_defined_at, "__defined_at__");
+    while(FL_TEST(rb_class_of(mod), RMODULE_IS_REFINEMENT)) {
+	rb_ary_push(ary, rb_attr_get(rb_class_of(mod), id_defined_at));
+	mod = RCLASS_SUPER(mod);
+    }
+    return ST_CONTINUE;
+}
+
+/*
+ *  call-seq:
+ *     used_refinements -> array
+ *
+ *  Returns an array of all active refinements in the current scope. The
+ *  ordering of modules in the resulting array is not defined.
+ *
+ *     module A
+ *       refine Object do
+ *       end
+ *     end
+ *
+ *     module B
+ *       refine Object do
+ *       end
+ *     end
+ *
+ *     module C
+ *       using B
+ *
+ *       refine Object do
+ *       end
+ *     end
+ *
+ *     using A
+ *     p used_refinements
+ *
+ *     C.module_eval { p used_refinements }
+ *
+ *  <em>produces:</em>
+ *
+ *     [A]
+ *     [C, B, A]
+ */
+static VALUE
+rb_f_used_refinements(void)
+{
+    NODE *cref = rb_vm_cref();
+    VALUE ary = rb_ary_new();
+
+    while(cref) {
+	if(!NIL_P(cref->nd_refinements)) {
+	    rb_hash_foreach(cref->nd_refinements, used_refinements_i, ary);
+	}
+	cref = cref->nd_next;
+    }
+
+    return rb_funcall(ary, rb_intern("uniq"), 0);
+}
+
 void
 rb_obj_call_init(VALUE obj, int argc, VALUE *argv)
 {
@@ -1601,6 +1663,8 @@ Init_eval(void)
     rb_define_global_function("__method__", rb_f_method_name, 0);
     rb_define_global_function("__callee__", rb_f_callee_name, 0);
     rb_define_global_function("__dir__", f_current_dirname, 0);
+    
+    rb_define_global_function("used_refinements", rb_f_used_refinements, 0);
 
     rb_define_private_method(rb_cModule, "append_features", rb_mod_append_features, 1);
     rb_define_private_method(rb_cModule, "extend_object", rb_mod_extend_object, 1);
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 3ca00ed..f8f03f2 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -822,4 +822,50 @@ class TestRefinement < Test::Unit::TestCase
       end
     end
   end
+  
+  module VisibleRefinements
+    module RefA
+      refine Object do
+        def in_ref_a
+        end
+      end
+    end
+
+    module RefB
+      refine Object do
+        def in_ref_b
+        end
+      end
+    end
+
+    module RefC
+      using RefA
+      
+      refine Object do
+        def in_ref_c
+        end
+      end
+    end
+
+    module Foo
+      using RefB
+    end
+
+    module Bar
+      using RefC
+    end
+    
+    module Combined
+      using Foo
+      using Bar
+    end
+  end
+
+  def test_used_refinements
+    ref = VisibleRefinements
+    assert_equal [], used_refinements
+    assert_equal [ref::RefB], ref::Foo.module_eval { used_refinements }
+    assert_equal [ref::RefC, ref::RefA], ref::Bar.module_eval { used_refinements }
+    assert_equal [ref::RefC, ref::RefA, ref::RefB], ref::Combined.module_eval { used_refinements }
+  end
 end