diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 51b6c9d..da54069 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -116,8 +116,7 @@
         PyErr_SetString(PyExc_SystemError, "non-tuple default args");
         return -1;
     }
-    Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);
-    ((PyFunctionObject *) op) -> func_defaults = defaults;
+    Py_SETREF(((PyFunctionObject *)op)->func_defaults, defaults);
     return 0;
 }
 
@@ -149,8 +148,7 @@
                      closure->ob_type->tp_name);
         return -1;
     }
-    Py_XDECREF(((PyFunctionObject *) op) -> func_closure);
-    ((PyFunctionObject *) op) -> func_closure = closure;
+    Py_SETREF(((PyFunctionObject *)op)->func_closure, closure);
     return 0;
 }
 
@@ -430,8 +428,7 @@
 
     if (name != Py_None) {
         Py_INCREF(name);
-        Py_DECREF(newfunc->func_name);
-        newfunc->func_name = name;
+        Py_SETREF(newfunc->func_name, name);
     }
     if (defaults != Py_None) {
         Py_INCREF(defaults);