diff --git a/usr.bin/lockf/lockf.c b/usr.bin/lockf/lockf.c
index 9a6141f40ac..5555c488cd1 100644
--- a/usr.bin/lockf/lockf.c
+++ b/usr.bin/lockf/lockf.c
@@ -169,7 +169,7 @@ acquire_lock(const char *name, int flags)
 {
 	int fd;
 
-	if ((fd = open(name, flags|O_RDONLY|O_EXLOCK|flags, 0666)) == -1) {
+	if ((fd = open(name, O_RDONLY|O_EXLOCK|flags, 0666)) == -1) {
 		if (errno == EAGAIN || errno == EINTR)
 			return (-1);
 		err(EX_CANTCREAT, "cannot open %s", name);