diff --git a/src/dird/dird_conf.c b/src/dird/dird_conf.c
index a7a30bc7632..a2478e0b991 100644
--- a/src/dird/dird_conf.c
+++ b/src/dird/dird_conf.c
@@ -245,7 +245,7 @@ static RES_ITEM cli_items[] = {
    { "MaximumConcurrentJobs", CFG_TYPE_PINT32, ITEM(res_client.MaxConcurrentJobs), 0, CFG_ITEM_DEFAULT, "1", NULL, NULL },
    { "MaximumBandwidthPerJob", CFG_TYPE_SPEED, ITEM(res_client.max_bandwidth), 0, 0, NULL, NULL, NULL },
    { "NdmpLogLevel", CFG_TYPE_PINT32, ITEM(res_client.ndmp_loglevel), 0, CFG_ITEM_DEFAULT, "4", NULL, NULL },
-   { "NdmpBlockSize", CFG_TYPE_PINT32, ITEM(res_client.ndmp_blocksize), 0, CFG_ITEM_DEFAULT, "64512", NULL, NULL },
+   { "NdmpBlockSize", CFG_TYPE_SIZE32, ITEM(res_client.ndmp_blocksize), 0, CFG_ITEM_DEFAULT, "64512", NULL, NULL },
    { "NdmpUseLmdb", CFG_TYPE_BOOL, ITEM(res_client.ndmp_use_lmdb), 0, CFG_ITEM_DEFAULT, "true", NULL, NULL },
    TLS_CONFIG(res_client)
    { NULL, 0, { 0 }, 0, 0, NULL, NULL, NULL }
@@ -507,8 +507,8 @@ static RES_ITEM pool_items[] = {
    { "Catalog", CFG_TYPE_RES, ITEM(res_pool.catalog), R_CATALOG, 0, NULL, NULL, NULL },
    { "FileRetention", CFG_TYPE_TIME, ITEM(res_pool.FileRetention), 0, 0, NULL, NULL, NULL },
    { "JobRetention", CFG_TYPE_TIME, ITEM(res_pool.JobRetention), 0, 0, NULL, NULL, NULL },
-   { "MinimumBlockSize", CFG_TYPE_PINT32, ITEM(res_pool.MinBlocksize), 0, 0, NULL, NULL, NULL },
-   { "MaximumBlockSize", CFG_TYPE_PINT32, ITEM(res_pool.MaxBlocksize), 0, 0, NULL, "14.2.0-", NULL },
+   { "MinimumBlockSize", CFG_TYPE_SIZE32, ITEM(res_pool.MinBlocksize), 0, 0, NULL, NULL, NULL },
+   { "MaximumBlockSize", CFG_TYPE_SIZE32, ITEM(res_pool.MaxBlocksize), 0, 0, NULL, "14.2.0-", NULL },
    { NULL, 0, { 0 }, 0, 0, NULL, NULL, NULL }
 };