diff --git a/samples/subsys/modbus/rtu_server/src/main.c b/samples/subsys/modbus/rtu_server/src/main.c
index d83fe4d002b..7113a7b7f84 100644
--- a/samples/subsys/modbus/rtu_server/src/main.c
+++ b/samples/subsys/modbus/rtu_server/src/main.c
@@ -109,7 +109,6 @@ const static struct modbus_iface_param server_param = {
 
 static int init_modbus_server(void)
 {
-	const uint32_t mb_rtu_br = 19200;
 	const char iface_name[] = {DT_PROP(DT_INST(0, zephyr_modbus_serial), label)};
 	int iface;