diff --git a/pyconfig.h.in b/pyconfig.h.in
index f37774c..383c587 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -58,6 +58,10 @@
 /* Define to 1 if you have the <bluetooth.h> header file. */
 #undef HAVE_BLUETOOTH_H
 
+/* Define if mbstowcs(NULL, "text", 0) does not return the number of wide
+   chars that would be converted. */
+#undef HAVE_BROKEN_MBSTOWCS
+
 /* Define if nice() returns success/failure instead of the new priority. */
 #undef HAVE_BROKEN_NICE
 
@@ -112,6 +116,18 @@
 /* Define if you have the 'resize_term' function. */
 #undef HAVE_CURSES_RESIZE_TERM
 
+/* Define to 1 if you have the declaration of `isfinite', and to 0 if you
+   don't. */
+#undef HAVE_DECL_ISFINITE
+
+/* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ISINF
+
+/* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ISNAN
+
 /* Define to 1 if you have the declaration of `tzname', and to 0 if you don't.
    */
 #undef HAVE_DECL_TZNAME
@@ -312,12 +328,6 @@
 /* Define to 1 if you have the <io.h> header file. */
 #undef HAVE_IO_H
 
-/* Define to 1 if you have the `isinf' function. */
-#undef HAVE_ISINF
-
-/* Define to 1 if you have the `isnan' function. */
-#undef HAVE_ISNAN
-
 /* Define to 1 if you have the `kill' function. */
 #undef HAVE_KILL
 
@@ -357,7 +367,7 @@
 /* Define to 1 if you have the <libintl.h> header file. */
 #undef HAVE_LIBINTL_H
 
-/* Define to 1 if you have the `readline' library (-lreadline). */
+/* Define if you have the readline library (-lreadline). */
 #undef HAVE_LIBREADLINE
 
 /* Define to 1 if you have the `resolv' library (-lresolv). */
@@ -800,10 +810,6 @@
 /* Define to 1 if you have the `wcsxfrm' function. */
 #undef HAVE_WCSXFRM
 
-/* Define if mbstowcs(NULL, "text", 0) does not return the number of 
-   wide chars that would be converted */
-#undef HAVE_BROKEN_MBSTOWCS
-
 /* Define if tzset() actually switches the local timezone in a meaningful way.
    */
 #undef HAVE_WORKING_TZSET
@@ -984,6 +990,9 @@
    first (like Motorola and SPARC, unlike Intel and VAX). */
 #undef WORDS_BIGENDIAN
 
+/* Define if arithmetic is subject to x87-style double rounding issue */
+#undef X87_DOUBLE_ROUNDING
+
 /* Define to 1 if on AIX 3.
    System headers sometimes define this.
    We just want to avoid a redefinition error message.  */