diff --git a/random.c b/random.c
index d8b3c7246e..55a6a6fc27 100644
--- a/random.c
+++ b/random.c
@@ -456,9 +456,9 @@ static int
 fill_random_bytes_urandom(void *seed, size_t size)
 {
     /*
-      O_NONBLOCK and O_NOCTTY is meaningless if /dev/urandom correctly point
-      to urandom device. But it protect from several strange hazard if
-      /dev/urandom is not urandom device.
+      O_NONBLOCK and O_NOCTTY is meaningless if /dev/urandom correctly points
+      to a urandom device. But it protects from several strange hazard if
+      /dev/urandom is not a urandom device.
     */
     int fd = rb_cloexec_open("/dev/urandom",
 # ifdef O_NONBLOCK