diff -r -u ../Python-3.3.3.orig/Modules/readline.c ./Modules/readline.c
--- ../Python-3.3.3.orig/Modules/readline.c	2013-11-17 16:23:01.000000000 +0900
+++ ./Modules/readline.c	2014-03-29 16:22:10.219305878 +0900
@@ -231,8 +231,7 @@
     if (!PyArg_ParseTuple(args, buf, &function))
         return NULL;
     if (function == Py_None) {
-        Py_XDECREF(*hook_var);
-        *hook_var = NULL;
+        Py_CLEAR(*hook_var);
     }
     else if (PyCallable_Check(function)) {
         PyObject *tmp = *hook_var;
@@ -774,14 +773,22 @@
 }
 
 static int
+#if defined(_RL_FUNCTION_TYPEDEF)
 on_startup_hook(void)
+#else
+on_startup_hook()
+#endif
 {
     return on_hook(startup_hook);
 }
 
 #ifdef HAVE_RL_PRE_INPUT_HOOK
 static int
+#if defined(_RL_FUNCTION_TYPEDEF)
 on_pre_input_hook(void)
+#else
+on_pre_input_hook()
+#endif
 {
     return on_hook(pre_input_hook);
 }
@@ -819,7 +826,7 @@
         (r != Py_None && PyLong_AsLong(r) == -1 && PyErr_Occurred())) {
         goto error;
     }
-    Py_XDECREF(r); r=NULL;
+    Py_CLEAR(r);
 
     if (0) {
     error:
@@ -877,7 +884,7 @@
  * before calling the normal completer */
 
 static char **
-flex_complete(char *text, int start, int end)
+flex_complete(const char *text, int start, int end)
 {
 #ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
     rl_completion_append_character ='\0';
@@ -936,12 +943,12 @@
     rl_bind_key_in_map ('\t', rl_complete, emacs_meta_keymap);
     rl_bind_key_in_map ('\033', rl_complete, emacs_meta_keymap);
     /* Set our hook functions */
-    rl_startup_hook = (Function *)on_startup_hook;
+    rl_startup_hook = on_startup_hook;
 #ifdef HAVE_RL_PRE_INPUT_HOOK
-    rl_pre_input_hook = (Function *)on_pre_input_hook;
+    rl_pre_input_hook = on_pre_input_hook;
 #endif
     /* Set our completion function */
-    rl_attempted_completion_function = (CPPFunction *)flex_complete;
+    rl_attempted_completion_function = flex_complete;
     /* Set Python word break characters */
     completer_word_break_characters =
         rl_completer_word_break_characters =