diff --git a/services/ir/.ir.env b/services/ir/.ir.env
index a767be6..eb9c8ae 100644
--- a/services/ir/.ir.env
+++ b/services/ir/.ir.env
@@ -1,6 +1,10 @@
 NEOFS_IR_LOGGER_LEVEL=debug
 NEOFS_IR_METRICS_ENABLED=true
 NEOFS_IR_PPROF_ENABLED=true
+
+# Toggling the sidechain-only mode
+NEOFS_IR_WITHOUT_MAINNET=false
+
 NEOFS_IR_MAINNET_ENDPOINT_CLIENT=http://main_chain:30333
 NEOFS_IR_MAINNET_ENDPOINT_NOTIFICATION=ws://main_chain:30333/ws
 NEOFS_IR_MORPH_ENDPOINT_CLIENT=http://morph_chain:30333