diff -r 6dcc96fa3970 Modules/posixmodule.c
--- a/Modules/posixmodule.c	Mon Sep 22 22:44:21 2014 -0400
+++ b/Modules/posixmodule.c	Tue Sep 23 06:21:55 2014 -0700
@@ -12708,7 +12708,10 @@
 #endif /* HAVE_TRUNCATE */
 
 
-#ifdef HAVE_POSIX_FALLOCATE
+/* AIX currently does not support a 32-bit call to posix_fallocate()
+   if _LARGE_FILES is defined.
+ */
+#if defined(HAVE_POSIX_FALLOCATE) && !(defined(_AIX) && defined(_LARGE_FILES) && !defined(__64BIT__))
 /*[clinic input]
 os.posix_fallocate
 
@@ -12774,7 +12777,10 @@
 #endif /* HAVE_POSIX_FALLOCATE */
 
 
-#ifdef HAVE_POSIX_FADVISE
+/* AIX currently does not support a 32-bit call to posix_fadvise()
+   if _LARGE_FILES is defined.
+ */
+#if defined(HAVE_POSIX_FADVISE) && !(defined(_AIX) && defined(_LARGE_FILES) && !defined(__64BIT__))
 /*[clinic input]
 os.posix_fadvise