diff --git a/library/psa_crypto_client.c b/library/psa_crypto_client.c
index 564463f..472d3d3 100644
--- a/library/psa_crypto_client.c
+++ b/library/psa_crypto_client.c
@@ -53,6 +53,11 @@
     const psa_key_attributes_t *attributes,
     uint8_t *data, size_t data_size, size_t *data_length)
 {
+    if (attributes->domain_parameters == NULL &&
+        attributes->domain_parameters_size == SIZE_MAX) {
+        return PSA_ERROR_NOT_SUPPORTED;
+    }
+
     if (attributes->domain_parameters_size > data_size) {
         return PSA_ERROR_BUFFER_TOO_SMALL;
     }