diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index 46e2a7e..98c25f1 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -2035,7 +2035,7 @@
  */
 static inline int mbedtls_svc_key_id_is_null( mbedtls_svc_key_id_t key )
 {
-    return( ( key.key_id == 0 ) && ( key.owner == 0 ) );
+    return( key.key_id == 0 );
 }
 
 #endif /* !MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER */