diff --git a/configure b/configure
index 2e42864..fe6c820 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 84948 .
+# From configure.in Revision: 85556 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.65 for python 2.7.
 #
@@ -1934,11 +1934,11 @@
        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
+	     enum { N = $2 / 2 - 1 };
 int
 main ()
 {
-static int test_array [1 - 2 * !(enum { N = $2 / 2 - 1 };
-	     0 < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1))];
+static int test_array [1 - 2 * !(0 < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1))];
 test_array [0] = 0
 
   ;
@@ -1949,11 +1949,11 @@
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
+	        enum { N = $2 / 2 - 1 };
 int
 main ()
 {
-static int test_array [1 - 2 * !(enum { N = $2 / 2 - 1 };
-		($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1)
+static int test_array [1 - 2 * !(($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1)
 		 < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 2))];
 test_array [0] = 0
 
@@ -13738,6 +13738,14 @@
 fi
 
 
+case $ac_sys_system in
+AIX*)
+
+$as_echo "#define HAVE_BROKEN_PIPE_BUF 1" >>confdefs.h
+ ;;
+esac
+
+
 
 
 for h in `(cd $srcdir;echo Python/thread_*.h)`
@@ -14293,8 +14301,8 @@
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
-config_files="`echo $ac_config_files`"
-config_headers="`echo $ac_config_headers`"
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
 
 _ACEOF
 
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 2c3c4fb..65ad7ac 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -36,7 +36,7 @@
 /* Define if --enable-ipv6 is specified */
 #undef ENABLE_IPV6
 
-/* Define if flock needs to be linked with bsd library */
+/* Define if flock needs to be linked with bsd library. */
 #undef FLOCK_NEEDS_LIBBSD
 
 /* Define if getpgrp() must be called as getpgrp(0). */
@@ -82,6 +82,9 @@
 /* Define if nice() returns success/failure instead of the new priority. */
 #undef HAVE_BROKEN_NICE
 
+/* Define if the system reports an invalid PIPE_BUF value. */
+#undef HAVE_BROKEN_PIPE_BUF
+
 /* Define if poll() sets errno on invalid file descriptors. */
 #undef HAVE_BROKEN_POLL
 
@@ -216,7 +219,7 @@
 /* Define to 1 if you have the `finite' function. */
 #undef HAVE_FINITE
 
-/* Define if you have the 'flock' function. */
+/* Define to 1 if you have the `flock' function. */
 #undef HAVE_FLOCK
 
 /* Define to 1 if you have the `fork' function. */