diff --git a/pyconfig.h.in b/pyconfig.h.in
index 732b8ff..ef26f82 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -297,6 +297,9 @@
 /* Define to 1 if you have the `hypot' function. */
 #undef HAVE_HYPOT
 
+/* Define to 1 if you have the <ieeefp.h> header file. */
+#undef HAVE_IEEEFP_H
+
 /* Define if you have the 'inet_aton' function. */
 #undef HAVE_INET_ATON