diff --git a/crypto/drbg.c b/crypto/drbg.c
index 84478cb..ff975d9 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -2019,7 +2019,7 @@
 	return crypto_register_algs(drbg_algs, (ARRAY_SIZE(drbg_cores) * 2));
 }
 
-void __exit drbg_exit(void)
+static void __exit drbg_exit(void)
 {
 	crypto_unregister_algs(drbg_algs, (ARRAY_SIZE(drbg_cores) * 2));
 }