diff -r 483096ef1cf6 Modules/pyexpat.c
--- a/Modules/pyexpat.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Modules/pyexpat.c	Wed Jan 29 17:56:15 2014 +0200
@@ -317,8 +317,7 @@
     }
     else {
         if (trace_frame(tstate, f, PyTrace_RETURN, res) < 0) {
-            Py_XDECREF(res);
-            res = NULL;
+            Py_CLEAR(res);
         }
     }
 #else
diff -r 483096ef1cf6 Modules/readline.c
--- a/Modules/readline.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Modules/readline.c	Wed Jan 29 17:56:15 2014 +0200
@@ -877,7 +877,7 @@
         (r != Py_None && PyLong_AsLong(r) == -1 && PyErr_Occurred())) {
         goto error;
     }
-    Py_XDECREF(r); r=NULL;
+    Py_CLEAR(r);
 
     if (0) {
     error:
diff -r 483096ef1cf6 Modules/signalmodule.c
--- a/Modules/signalmodule.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Modules/signalmodule.c	Wed Jan 29 17:56:15 2014 +0200
@@ -1305,12 +1305,9 @@
         Py_XDECREF(func);
     }
 
-    Py_XDECREF(IntHandler);
-    IntHandler = NULL;
-    Py_XDECREF(DefaultHandler);
-    DefaultHandler = NULL;
-    Py_XDECREF(IgnoreHandler);
-    IgnoreHandler = NULL;
+    Py_CLEAR(IntHandler);
+    Py_CLEAR(DefaultHandler);
+    Py_CLEAR(IgnoreHandler);
 }
 
 
diff -r 483096ef1cf6 Modules/syslogmodule.c
--- a/Modules/syslogmodule.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Modules/syslogmodule.c	Wed Jan 29 17:56:15 2014 +0200
@@ -197,8 +197,7 @@
 {
     if (S_log_open) {
         closelog();
-        Py_XDECREF(S_ident_o);
-        S_ident_o = NULL;
+        Py_CLEAR(S_ident_o);
         S_log_open = 0;
     }
     Py_INCREF(Py_None);
diff -r 483096ef1cf6 Modules/zlibmodule.c
--- a/Modules/zlibmodule.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Modules/zlibmodule.c	Wed Jan 29 17:56:15 2014 +0200
@@ -463,8 +463,7 @@
     }
 
  error:
-    Py_XDECREF(self);
-    self = NULL;
+    Py_CLEAR(self);
  success:
     return (PyObject*)self;
 }
diff -r 483096ef1cf6 Python/ceval.c
--- a/Python/ceval.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Python/ceval.c	Wed Jan 29 17:56:15 2014 +0200
@@ -3189,8 +3189,7 @@
                 if (call_trace(tstate->c_tracefunc, tstate->c_traceobj,
                                tstate, f,
                                PyTrace_RETURN, retval)) {
-                    Py_XDECREF(retval);
-                    retval = NULL;
+                    Py_CLEAR(retval);
                     why = WHY_EXCEPTION;
                 }
             }
@@ -3209,8 +3208,7 @@
             else if (call_trace(tstate->c_profilefunc, tstate->c_profileobj,
                                 tstate, f,
                                 PyTrace_RETURN, retval)) {
-                Py_XDECREF(retval);
-                retval = NULL;
+                Py_CLEAR(retval);
                 /* why = WHY_EXCEPTION; */
             }
         }
diff -r 483096ef1cf6 Python/import.c
--- a/Python/import.c	Wed Jan 29 11:45:31 2014 +0200
+++ b/Python/import.c	Wed Jan 29 17:56:15 2014 +0200
@@ -343,8 +343,7 @@
 void
 _PyImport_Fini(void)
 {
-    Py_XDECREF(extensions);
-    extensions = NULL;
+    Py_CLEAR(extensions);
 #ifdef WITH_THREAD
     if (import_lock != NULL) {
         PyThread_free_lock(import_lock);