diff --git a/pyconfig.h.in b/pyconfig.h.in
index db7f9dd..40067f6 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -74,6 +74,9 @@
 /* Define if pthread_sigmask() does not work on your system. */
 #undef HAVE_BROKEN_PTHREAD_SIGMASK
 
+/* define to 1 if your sem_getvalue is broken. */
+#undef HAVE_BROKEN_SEM_GETVALUE
+
 /* Define this if you have the type _Bool. */
 #undef HAVE_C99_BOOL
 
@@ -505,6 +508,18 @@
 /* Define to 1 if you have the `select' function. */
 #undef HAVE_SELECT
 
+/* Define to 1 if you have the `sem_getvalue' function. */
+#undef HAVE_SEM_GETVALUE
+
+/* Define to 1 if you have the `sem_open' function. */
+#undef HAVE_SEM_OPEN
+
+/* Define to 1 if you have the `sem_timedwait' function. */
+#undef HAVE_SEM_TIMEDWAIT
+
+/* Define to 1 if you have the `sem_unlink' function. */
+#undef HAVE_SEM_UNLINK
+
 /* Define to 1 if you have the `setegid' function. */
 #undef HAVE_SETEGID