diff --git a/ChangeLog b/ChangeLog
index eb2cf2ef67..6eb9edc01a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Mon Nov 12 15:59:38 2012  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* vm_core.h (rb_call_info_t::refinements), compile.c (new_callinfo),
+	  vm_insnhelper.c (vm_search_method): revert r37616 because it's too
+	  slow.  [ruby-dev:46477]
+
+	* test/ruby/test_refinement.rb (test_inline_method_cache): skip
+	  the test until the bug is fixed efficiently.
+
 Mon Nov 12 14:28:01 2012  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* win32/mkexports.rb (each_export): skip garbages generated by VS2012's
diff --git a/compile.c b/compile.c
index eb824caf23..16bfcefdbb 100644
--- a/compile.c
+++ b/compile.c
@@ -954,7 +954,6 @@ new_callinfo(rb_iseq_t *iseq, ID mid, int argc, VALUE block, unsigned long flag)
 	}
     }
     ci->vmstat = 0;
-    ci->refinements = Qundef;
     ci->blockptr = 0;
     ci->recv = Qundef;
     ci->call = 0; /* TODO: should set default function? */
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 9343f543f2..e367532ec5 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -726,6 +726,7 @@ class TestRefinement < Test::Unit::TestCase
   end
 
   def test_inline_method_cache
+    skip "can't implement efficiently with the current implementation of refinements"
     c = InlineMethodCache::C.new
     f = Proc.new { c.foo }
     assert_equal("original", f.call)
diff --git a/vm_core.h b/vm_core.h
index 82400a3530..dd9e3872e2 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -153,7 +153,6 @@ typedef struct rb_call_info_struct {
     /* inline cache: keys */
     VALUE vmstat;
     VALUE klass;
-    VALUE refinements;
 
     /* inline cache: values */
     const rb_method_entry_t *me;
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index cf64c14684..554aad47b1 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -843,30 +843,19 @@ static void
 vm_search_method(rb_call_info_t *ci, VALUE recv)
 {
     VALUE klass = CLASS_OF(recv);
-    NODE *cref = rb_vm_cref();
-    VALUE refinements = Qnil;
-
-    if (cref && !NIL_P(cref->nd_refinements)) {
-	refinements = cref->nd_refinements;
-    }
 
 #if OPT_INLINE_METHOD_CACHE
-    if (LIKELY(GET_VM_STATE_VERSION() == ci->vmstat && klass == ci->klass &&
-	       refinements == ci->refinements)) {
+    if (LIKELY(GET_VM_STATE_VERSION() == ci->vmstat && klass == ci->klass)) {
 	/* cache hit! */
     }
     else {
-	ci->me = rb_method_entry_get_with_refinements(refinements, klass,
-						      ci->mid,
-						      &ci->defined_class);
+	ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
 	ci->klass = klass;
-	ci->refinements = refinements;
 	ci->vmstat = GET_VM_STATE_VERSION();
 	ci->call = vm_call_general;
     }
 #else
-    ci->me = rb_method_entry_get_with_refinements(refinements, klass, ci->mid,
-						  &ci->defined_class);
+    ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
     ci->call = vm_call_general;
     ci->klass = klass;
 #endif