diff --git a/ydb/tools/cfg/dynamic.py b/ydb/tools/cfg/dynamic.py
index 04d1e08f0c3c..837b0d2e4a41 100644
--- a/ydb/tools/cfg/dynamic.py
+++ b/ydb/tools/cfg/dynamic.py
@@ -270,7 +270,8 @@ def make_configure_request(self, domain):
         if self._cluster_details.use_auto_config:
             app_config.ActorSystemConfig.CpuCount = self._cluster_details.dynamic_cpu_count
             app_config.ActorSystemConfig.NodeType = app_config.ActorSystemConfig.ENodeType.Value('COMPUTE')
-            app_config.ActorSystemConfig.ForceIOPoolThreads = self._cluster_details.force_io_pool_threads
+            if self._cluster_details.force_io_pool_threads is not None:
+                app_config.ActorSystemConfig.ForceIOPoolThreads = self._cluster_details.force_io_pool_threads
         action.AddConfigItem.ConfigItem.Config.CopyFrom(app_config)
         action.AddConfigItem.EnableAutoSplit = True