diff --git a/crud/count.lua b/crud/count.lua
index b79581cd..470bcce5 100644
--- a/crud/count.lua
+++ b/crud/count.lua
@@ -24,7 +24,7 @@ local count = {}
 
 local function count_on_storage(space_name, index_id, conditions, opts)
     dev_checks('string', 'number', '?table', {
-        scan_value = 'table',
+        scan_value = 'table|cdata',
         tarantool_iter = 'number',
         yield_every = '?number',
         scan_condition_num = '?number',
diff --git a/crud/readview.lua b/crud/readview.lua
index cb7c8c7f..d5ff6dd5 100644
--- a/crud/readview.lua
+++ b/crud/readview.lua
@@ -94,8 +94,8 @@ end
 
 local function select_readview_on_storage(space_name, index_id, conditions, opts)
     dev_checks('string', 'number', '?table', {
-        scan_value = 'table',
-        after_tuple = '?table',
+        scan_value = 'table|cdata',
+        after_tuple = '?table|cdata',
         tarantool_iter = 'number',
         limit = 'number',
         scan_condition_num = '?number',