diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index a3eafff..1ca8362 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -469,6 +469,7 @@
     mbedtls_pk_free(&key);
     mbedtls_ctr_drbg_free(&ctr_drbg);
     mbedtls_entropy_free(&entropy);
+    mbedtls_psa_crypto_free();
 
     cur = opt.san_list;
     while (cur != NULL) {