diff --git a/programs/x509/req_app.c b/programs/x509/req_app.c
index c63f896..f5fbc79 100644
--- a/programs/x509/req_app.c
+++ b/programs/x509/req_app.c
@@ -134,6 +134,7 @@
 
 exit:
     mbedtls_x509_csr_free(&csr);
+    mbedtls_psa_crypto_free();
 
     mbedtls_exit(exit_code);
 }