diff -Naur libevent1/configure.ac libevent/configure.ac
--- libevent1/configure.ac	2019-02-05 18:57:05.762000000 +0100
+++ libevent/configure.ac	2019-02-05 18:57:56.193000000 +0100
@@ -342,6 +342,7 @@
   accept4 \
   arc4random \
   arc4random_buf \
+  arc4random_addrandom \
   eventfd \
   epoll_create1 \
   fcntl \
diff -Naur libevent1/evutil_rand.c libevent/evutil_rand.c
--- libevent1/evutil_rand.c	2019-02-05 18:57:05.762000000 +0100
+++ libevent/evutil_rand.c	2019-02-05 18:58:48.174000000 +0100
@@ -195,8 +195,10 @@
 void
 evutil_secure_rng_add_bytes(const char *buf, size_t n)
 {
+#ifdef _EVENT_HAVE_ARC4RANDOM_ADDRANDOM
 	arc4random_addrandom((unsigned char*)buf,
 	    n>(size_t)INT_MAX ? INT_MAX : (int)n);
+#endif
 }
 
 void
