diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 9705c279494b..96557cf6389e 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -55,7 +55,7 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
 		return -EINVAL;
 	}
 
-	algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
+	algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
 	return 0;
 }
 
@@ -71,7 +71,7 @@ static int verify_auth_trunc(struct nlattr **attrs)
 	if (nla_len(rt) < xfrm_alg_auth_len(algp))
 		return -EINVAL;
 
-	algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
+	algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
 	return 0;
 }
 
@@ -87,7 +87,7 @@ static int verify_aead(struct nlattr **attrs)
 	if (nla_len(rt) < aead_len(algp))
 		return -EINVAL;
 
-	algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
+	algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
 	return 0;
 }