diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c
index 83a31ad..51a79ec 100644
--- a/programs/x509/cert_app.c
+++ b/programs/x509/cert_app.c
@@ -457,7 +457,9 @@
 #endif
     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 */
 
     mbedtls_exit(exit_code);
 }