diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index 2f9a15a820..9760e9a293 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -2269,8 +2269,8 @@ static inline int mbedtls_svc_key_id_is_null( mbedtls_svc_key_id_t key )
 #else /* MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER */
 
 #define MBEDTLS_SVC_KEY_ID_INIT ( (mbedtls_svc_key_id_t){ 0, 0 } )
-#define MBEDTLS_SVC_KEY_ID_GET_KEY_ID( id ) ( ( id ).key_id )
-#define MBEDTLS_SVC_KEY_ID_GET_OWNER_ID( id ) ( ( id ).owner )
+#define MBEDTLS_SVC_KEY_ID_GET_KEY_ID( id ) ( ( id ).MBEDTLS_PRIVATE(key_id) )
+#define MBEDTLS_SVC_KEY_ID_GET_OWNER_ID( id ) ( ( id ).MBEDTLS_PRIVATE(owner) )
 
 /** Utility to initialize a key identifier at runtime.
  *