--- rngd_entsource.c.orig	2015-08-13 22:18:53.239864591 -0700
+++ rngd_entsource.c	2015-08-13 22:18:55.695897940 -0700
@@ -175,7 +175,11 @@
  */
 int init_entropy_source(struct rng *ent_src)
 {
-	ent_src->rng_fd = open(ent_src->rng_name, O_RDONLY);
+	int flags = O_RDONLY;
+#	ifdef O_NOCTTY
+		flags |= O_NOCTTY;
+#	endif
+	ent_src->rng_fd = open(ent_src->rng_name, flags);
 	if (ent_src->rng_fd == -1) {
 		return 1;
 	}