diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 1ca8362..1772f87 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -469,7 +469,9 @@
     mbedtls_pk_free(&key);
     mbedtls_ctr_drbg_free(&ctr_drbg);
     mbedtls_entropy_free(&entropy);
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
     mbedtls_psa_crypto_free();
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     cur = opt.san_list;
     while (cur != NULL) {