diff --git a/library/x509write_csr.c b/library/x509write_csr.c
index a9fc8ba..a58374f 100644
--- a/library/x509write_csr.c
+++ b/library/x509write_csr.c
@@ -225,7 +225,7 @@
                           PSA_HASH_MAX_SIZE,
                           &hash_len ) != PSA_SUCCESS )
     {
-        return ( MBEDTLS_ERR_X509_FATAL_ERROR );
+        return ( MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED );
     }
 #else /* MBEDTLS_USE_PSA_CRYPTO */
     ret = mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );