diff --git a/drivers/crypto/ccp/ccp-crypto-rsa.c b/drivers/crypto/ccp/ccp-crypto-rsa.c
index 05850dfd7940..0b8aab009e7b 100644
--- a/drivers/crypto/ccp/ccp-crypto-rsa.c
+++ b/drivers/crypto/ccp/ccp-crypto-rsa.c
@@ -248,7 +248,8 @@ static struct ccp_rsa_def rsa_algs[] = {
 	}
 };
 
-int ccp_register_rsa_alg(struct list_head *head, const struct ccp_rsa_def *def)
+static int ccp_register_rsa_alg(struct list_head *head,
+			        const struct ccp_rsa_def *def)
 {
 	struct ccp_crypto_akcipher_alg *ccp_alg;
 	struct akcipher_alg *alg;