diff --git a/lib/libc/gen/arc4random.c b/lib/libc/gen/arc4random.c
index 1c4d6eebe5fe..a48c6f819388 100644
--- a/lib/libc/gen/arc4random.c
+++ b/lib/libc/gen/arc4random.c
@@ -59,7 +59,6 @@ struct arc4_stream {
 
 static pthread_mutex_t	arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 
-#define	RANDOMDEV	"/dev/random"
 #define	KEYSIZE		128
 #define	_ARC4_LOCK()						\
 	do {							\