diff --git a/pyconfig.h.in b/pyconfig.h.in
index efe732f..6b49721 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -512,9 +512,6 @@
 /* Define this if you have the makedev macro. */
 #undef HAVE_MAKEDEV
 
-/* Define if mallopt can set malloc mmap threshold. */
-#undef HAVE_MALLOPT_MMAP_THRESHOLD
-
 /* Define to 1 if you have the `mbrtowc' function. */
 #undef HAVE_MBRTOWC
 
@@ -545,6 +542,9 @@
 /* Define to 1 if you have the `mktime' function. */
 #undef HAVE_MKTIME
 
+/* Define to 1 if you have the `mmap' function. */
+#undef HAVE_MMAP
+
 /* Define to 1 if you have the `mremap' function. */
 #undef HAVE_MREMAP