--- configure.ac	2022-03-24 13:14:11.000000000 +0100
+++ configure.ac.new	2022-03-24 15:58:56.187367770 +0100
@@ -95,7 +95,10 @@ AS_IF(
 				[AM_CONDITIONAL([JITTER], [true])
 				AC_DEFINE([HAVE_JITTER],1,[Enable JITTER])
 				AC_CHECK_LIB(jitterentropy, jent_notime_settick,
-				[AC_DEFINE([HAVE_JITTER_NOTIME],1,[Enable JITTER_NOTIME])],
+				[
+					AC_DEFINE([HAVE_JITTER_NOTIME],1,[Enable JITTER_NOTIME])
+					AC_DEFINE([JENT_CONF_ENABLE_INTERNAL_TIMER],1,[Enable JENT_CONF_ENABLE_INTERNAL_TIMER])
+				],
 				[],-lpthread)],
 				AC_MSG_NOTICE([No Jitterentropy library found]),-lpthread)
 	], [AC_MSG_NOTICE([Disabling JITTER entropy source])]