diff --git a/pyconfig.h.in b/pyconfig.h.in
index 231146a..4f252dc 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -1118,6 +1118,9 @@
 /* Define to 1 if you have the `wcsxfrm' function. */
 #undef HAVE_WCSXFRM
 
+/* Define to 1 if you have the `wmemcmp' function. */
+#undef HAVE_WMEMCMP
+
 /* Define if tzset() actually switches the local timezone in a meaningful way.
    */
 #undef HAVE_WORKING_TZSET
@@ -1190,9 +1193,6 @@
 /* Define if setpgrp() must be called as setpgrp(0, 0). */
 #undef SETPGRP_HAVE_ARG
 
-/* Define this to be extension of shared libraries (including the dot!). */
-#undef SHLIB_EXT
-
 /* Define if i>>j for signed int i does not extend the sign bit when i < 0 */
 #undef SIGNED_RIGHT_SHIFT_ZERO_FILLS