diff --git a/pyconfig.h.in b/pyconfig.h.in
index dbaa5c4..33ba6c7 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -110,6 +110,12 @@
 /* Define to 1 if you have the `clock' function. */
 #undef HAVE_CLOCK
 
+/* Define to 1 if you have the `clock_getres' function. */
+#undef HAVE_CLOCK_GETRES
+
+/* Define to 1 if you have the `clock_gettime' function. */
+#undef HAVE_CLOCK_GETTIME
+
 /* Define if the C compiler supports computed gotos. */
 #undef HAVE_COMPUTED_GOTOS
 
@@ -1199,6 +1205,9 @@
 /* Define if tanh(-0.) is -0., or if platform doesn't have signed zeros */
 #undef TANH_PRESERVES_ZERO_SIGN
 
+/* Library needed by timemodule.c: librt may be needed for clock_gettime() */
+#undef TIMEMODULE_LIB
+
 /* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
 #undef TIME_WITH_SYS_TIME