diff --git a/evutil_rand.c b/evutil_rand.c
index 8e9afdaa..139d0d03 100644
--- a/evutil_rand.c
+++ b/evutil_rand.c
@@ -53,7 +53,7 @@ int
 evutil_secure_rng_init(void)
 {
 	/* call arc4random() now to force it to self-initialize */
-	(void) arc4random();
+	(void)! arc4random();
 	return 0;
 }
 #ifndef EVENT__DISABLE_THREAD_SUPPORT