diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index 313e8ab..c36d239 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -732,21 +732,6 @@ static PyMappingMethods proxy_as_mapping = {
 };
 
 
-static Py_hash_t
-proxy_hash(PyObject *self)
-{
-    PyWeakReference *proxy = (PyWeakReference *)self;
-    if (!proxy_checkref(proxy)) {
-        return -1;
-    }
-    PyObject *obj = PyWeakref_GET_OBJECT(proxy);
-    Py_INCREF(obj);
-    Py_hash_t res = PyObject_Hash(obj);
-    Py_DECREF(obj);
-    return res;
-}
-
-
 PyTypeObject
 _PyWeakref_ProxyType = {
     PyVarObject_HEAD_INIT(&PyType_Type, 0)
@@ -763,7 +748,8 @@ _PyWeakref_ProxyType = {
     &proxy_as_number,                   /* tp_as_number */
     &proxy_as_sequence,                 /* tp_as_sequence */
     &proxy_as_mapping,                  /* tp_as_mapping */
-    proxy_hash,                         /* tp_hash */
+// Notice that tp_hash is intentionally omitted as proxies are "mutable" (when the reference dies).
+    0,                                  /* tp_hash */
     0,                                  /* tp_call */
     proxy_str,                          /* tp_str */
     proxy_getattr,                      /* tp_getattro */