diff --git a/configure b/configure
index 011c498..c2553fe 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 80449 .
+# From configure.in Revision: 80474 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.65 for python 3.2.
 #
@@ -4581,7 +4581,6 @@
 
 
 
-
 # Check for unsupported systems
 case $ac_sys_system/$ac_sys_release in
 atheos*|Linux*/1*)
diff --git a/configure.in b/configure.in
index 855fa3b..12cb213 100644
--- a/configure.in
+++ b/configure.in
@@ -500,7 +500,7 @@
 
 
 # checks for UNIX variants that set C preprocessor variables
-AC_AIX
+AC_USE_SYSTEM_EXTENSIONS
 
 # Check for unsupported systems
 case $ac_sys_system/$ac_sys_release in