diff --git a/class.c b/class.c
index a642ff0..9d346ee 100644
--- a/class.c
+++ b/class.c
@@ -927,7 +927,7 @@ static VALUE
 class_instance_method_list(int argc, VALUE *argv, VALUE mod, int obj, int (*func) (st_data_t, st_data_t, st_data_t))
 {
     VALUE ary;
-    int recur;
+    int recur, prepended = 0;
     st_table *list;
 
     if (argc == 0) {
@@ -939,10 +939,15 @@ class_instance_method_list(int argc, VALUE *argv, VALUE mod, int obj, int (*func
 	recur = RTEST(r);
     }
 
+    if (!recur && RCLASS_ORIGIN(mod) != mod) {
+	mod = RCLASS_ORIGIN(mod);
+	prepended = 1;
+    }
+
     list = st_init_numtable();
     for (; mod; mod = RCLASS_SUPER(mod)) {
 	if (RCLASS_M_TBL(mod)) st_foreach(RCLASS_M_TBL(mod), method_entry_i, (st_data_t)list);
-	if (BUILTIN_TYPE(mod) == T_ICLASS) continue;
+	if (BUILTIN_TYPE(mod) == T_ICLASS && !prepended) continue;
 	if (obj && FL_TEST(mod, FL_SINGLETON)) continue;
 	if (!recur) break;
     }
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index d7a6248..1a61535 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -1299,4 +1299,9 @@ class TestModule < Test::Unit::TestCase
       end
     end
   end
+
+  def test_prepend_instance_methods_fale
+    assert_equal([:m1], Class.new{ prepend Module.new; def m1; end }.instance_methods(false))
+    assert_equal([:m1], Class.new(Class.new{def m2;end}){ prepend Module.new; def m1; end }.instance_methods(false))
+  end
 end