diff --git a/examples/protocols/modbus/tcp/mb_tcp_slave/sdkconfig.defaults b/examples/protocols/modbus/tcp/mb_tcp_slave/sdkconfig.defaults
index bf2d645de5..76ad97c3f3 100644
--- a/examples/protocols/modbus/tcp/mb_tcp_slave/sdkconfig.defaults
+++ b/examples/protocols/modbus/tcp/mb_tcp_slave/sdkconfig.defaults
@@ -11,11 +11,7 @@ CONFIG_FMB_COMM_MODE_ASCII_EN=n
 CONFIG_FMB_MASTER_TIMEOUT_MS_RESPOND=1000
 CONFIG_FMB_MASTER_DELAY_MS_CONVERT=300
 CONFIG_FMB_TIMER_PORT_ENABLED=y
-CONFIG_FMB_TIMER_GROUP=0
-CONFIG_FMB_TIMER_INDEX=0
-CONFIG_FMB_TIMER_ISR_IN_IRAM=y
 CONFIG_MB_MDNS_IP_RESOLVER=n
-CONFIG_MB_SLAVE_IP_FROM_STDIN=y
 CONFIG_MB_SLAVE_ADDR=1
 CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y
 CONFIG_EXAMPLE_CONNECT_IPV6=n