diff --git a/ChangeLog b/ChangeLog
index 96f5044a58..80b4948242 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Sun Jun  3 21:14:26 2012  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* marshal.c: calls directly rb_{Complex,Rational}_marshal_load().
+	  But now disabled. [experimental]
+	* complex.c: followed the above.
+	* rational.c: ditto.
+	* include/rub/intern.h: ditto.
+
 Sun Jun  3 21:18:17 2012  Tanaka Akira  <akr@fsij.org>
 
 	* process.c (rb_check_argv): use rb_str_new_frozen instead of
diff --git a/complex.c b/complex.c
index c5303c10d9..6036ab72fd 100644
--- a/complex.c
+++ b/complex.c
@@ -1283,6 +1283,21 @@ nucomp_marshal_load(VALUE self, VALUE a)
     return self;
 }
 
+#ifdef MARSHAL_LOAD_DIRECT
+/* :nodoc: */
+static VALUE
+nucomp_marshal_load_fake(VALUE self, VALUE a)
+{
+    rb_raise(rb_eNotImpError, "not implemented");
+}
+
+VALUE
+rb_Complex_marshal_load(VALUE obj, VALUE a)
+{
+    return nucomp_marshal_load(obj, a);
+}
+#endif
+
 #ifdef MARSHAL_OLD_STYLE
 /* :nodoc: */
 static VALUE
@@ -1970,6 +1985,7 @@ Init_Complex(void)
     rb_define_method(rb_cComplex, "to_s", nucomp_to_s, 0);
     rb_define_method(rb_cComplex, "inspect", nucomp_inspect, 0);
 
+#ifndef MARSHAL_LOAD_DIRECT
 #ifndef MARSHAL_OLD_STYLE
     rb_define_method(rb_cComplex, "marshal_dump", nucomp_marshal_dump, 0);
     rb_define_method(rb_cComplex, "marshal_load", nucomp_marshal_load, 1);
@@ -1977,6 +1993,10 @@ Init_Complex(void)
     rb_define_method(rb_cComplex, "_dump", nucomp_marshal__dump, 1);
     rb_define_singleton_method(rb_cComplex, "_load", nucomp_marshal__load, 1);
 #endif
+#else
+    rb_define_method(rb_cComplex, "marshal_dump", nucomp_marshal_dump, 0);
+    rb_define_method(rb_cComplex, "marshal_load", nucomp_marshal_load_fake, 1);
+#endif
 
     /* --- */
 
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 668d59a1fb..693e52b5bd 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -147,6 +147,9 @@ VALUE rb_rational_new(VALUE, VALUE);
 VALUE rb_Rational(VALUE, VALUE);
 #define rb_Rational1(x) rb_Rational((x), INT2FIX(1))
 #define rb_Rational2(x,y) rb_Rational((x), (y))
+#ifdef MARSHAL_LOAD_DIRECT
+VALUE rb_Rational_marshal_load(VALUE, VALUE);
+#endif
 /* complex.c */
 VALUE rb_complex_raw(VALUE, VALUE);
 #define rb_complex_raw1(x) rb_complex_raw((x), INT2FIX(0))
@@ -158,6 +161,9 @@ VALUE rb_complex_polar(VALUE, VALUE);
 VALUE rb_Complex(VALUE, VALUE);
 #define rb_Complex1(x) rb_Complex((x), INT2FIX(0))
 #define rb_Complex2(x,y) rb_Complex((x), (y))
+#ifdef MARSHAL_LOAD_DIRECT
+VALUE rb_Complex_marshal_load(VALUE, VALUE);
+#endif
 /* class.c */
 VALUE rb_class_boot(VALUE);
 VALUE rb_class_new(VALUE);
diff --git a/marshal.c b/marshal.c
index 046729d364..45048db2f2 100644
--- a/marshal.c
+++ b/marshal.c
@@ -1622,7 +1622,21 @@ r_object0(struct load_arg *arg, int *ivp, VALUE extmod)
 	    }
 	    v = r_entry(v, arg);
 	    data = r_object(arg);
+#ifndef MARSHAL_LOAD_DIRECT
 	    rb_funcall(v, s_mload, 1, data);
+#else
+	    switch (TYPE(v)) {
+	    case T_COMPLEX:
+	      rb_Complex_marshal_load(v, data);
+	      break;
+	    case T_RATIONAL:
+	      rb_Rational_marshal_load(v, data);
+	      break;
+	    default:
+	      rb_funcall(v, s_mload, 1, data);
+	      break;
+	    }
+#endif
 	    check_load_arg(arg, s_mload);
             v = r_leave(v, arg);
 	}
diff --git a/rational.c b/rational.c
index 248fcdada0..6fda5a29ce 100644
--- a/rational.c
+++ b/rational.c
@@ -1632,6 +1632,21 @@ nurat_marshal_load(VALUE self, VALUE a)
     return self;
 }
 
+#ifdef MARSHAL_LOAD_DIRECT
+/* :nodoc: */
+static VALUE
+nurat_marshal_load_fake(VALUE self, VALUE a)
+{
+    rb_raise(rb_eNotImpError, "not implemented");
+}
+
+ VALUE
+rb_Rational_marshal_load(VALUE obj, VALUE a)
+{
+    return nurat_marshal_load(obj, a);
+}
+#endif
+
 #ifdef MARSHAL_OLD_STYLE
 /* :nodoc: */
 static VALUE
@@ -2393,6 +2408,7 @@ Init_Rational(void)
     rb_define_method(rb_cRational, "to_s", nurat_to_s, 0);
     rb_define_method(rb_cRational, "inspect", nurat_inspect, 0);
 
+#ifndef MARSHAL_LOAD_DIRECT
 #ifndef MARSHAL_OLD_STYLE
     rb_define_method(rb_cRational, "marshal_dump", nurat_marshal_dump, 0);
     rb_define_method(rb_cRational, "marshal_load", nurat_marshal_load, 1);
@@ -2400,6 +2416,10 @@ Init_Rational(void)
     rb_define_method(rb_cRational, "_dump", nurat_marshal__dump, 1);
     rb_define_singleton_method(rb_cRational, "_load", nurat_marshal__load, 1);
 #endif
+#else
+    rb_define_method(rb_cRational, "marshal_dump", nurat_marshal_dump, 0);
+    rb_define_method(rb_cRational, "marshal_load", nurat_marshal_load_fake, 1);
+#endif
 
     /* --- */