diff --git a/components/solax_modbus/solax_modbus.cpp b/components/solax_modbus/solax_modbus.cpp
index f738bc5..03f0efb 100644
--- a/components/solax_modbus/solax_modbus.cpp
+++ b/components/solax_modbus/solax_modbus.cpp
@@ -2,7 +2,7 @@
 #include "esphome/core/log.h"
 #include "esphome/core/helpers.h"
 
-#define BROADCAST_ADDRESS 0xFF
+static const uint8_t BROADCAST_ADDRESS = 0xFF;
 
 namespace esphome {
 namespace solax_modbus {