diff --git a/secure_fw/partitions/internal_trusted_storage/tfm_internal_trusted_storage.c b/secure_fw/partitions/internal_trusted_storage/tfm_internal_trusted_storage.c
index b98574365..2c6a41c2a 100644
--- a/secure_fw/partitions/internal_trusted_storage/tfm_internal_trusted_storage.c
+++ b/secure_fw/partitions/internal_trusted_storage/tfm_internal_trusted_storage.c
@@ -103,7 +103,7 @@ static psa_status_t buffer_size_check(int32_t client_id, size_t buffer_size)
          * global buffer.
          */
         if (buffer_size > sizeof(enc_asset_data)) {
-            return PSA_ERROR_BUFFER_TOO_SMALL;
+            return PSA_ERROR_INVALID_ARGUMENT;
         }
     }
     return PSA_SUCCESS;