diff --git a/psycopg/notify_type.c b/psycopg/notify_type.c
index ec2ec36f..544188d4 100644
--- a/psycopg/notify_type.c
+++ b/psycopg/notify_type.c
@@ -189,10 +189,10 @@ exit:
 }
 
 
-long
+Py_hash_t
 notify_hash(NotifyObject *self)
 {
-    long rv = -1L;
+    Py_hash_t rv = -1L;
     PyObject *tself = NULL;
 
     /* if self == a tuple, then their hashes are the same. */
diff --git a/psycopg/python.h b/psycopg/python.h
index c3f9a0d1..fed0303e 100644
--- a/psycopg/python.h
+++ b/psycopg/python.h
@@ -54,6 +54,15 @@
   #define CONV_CODE_PY_SSIZE_T "n"
 #endif
 
+/* hash() return size changed around version 3.2a4 on 64bit platforms.  Before
+ *   this, the return size was always a long, regardless of arch.  ~3.2 
+ *   introduced the Py_hash_t & Py_uhash_t typedefs with the resulting sizes
+ *   based upon arch. */
+#if PY_VERSION_HEX < 0x030200A4
+typedef long Py_hash_t;
+typedef unsigned long Py_uhash_t;
+#endif
+
 /* Macros defined in Python 2.6 */
 #ifndef Py_REFCNT
 #define Py_REFCNT(ob)           (((PyObject*)(ob))->ob_refcnt)