diff --git a/drivers/char/random.c b/drivers/char/random.c
index 11266697b3aa..aa75ee5b97fb 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -415,7 +415,7 @@ struct crng_state {
 	spinlock_t	lock;
 };
 
-struct crng_state primary_crng = {
+static struct crng_state primary_crng = {
 	.lock = __SPIN_LOCK_UNLOCKED(primary_crng.lock),
 };