diff --git a/components/ratgdo/ratgdo.h b/components/ratgdo/ratgdo.h
index 7dea501..8d00dae 100644
--- a/components/ratgdo/ratgdo.h
+++ b/components/ratgdo/ratgdo.h
@@ -25,14 +25,14 @@ extern "C" {
 #include "ratgdo_child.h"
 #include "ratgdo_state.h"
 
-#define CODE_LENGTH 19
-
 namespace esphome {
 namespace ratgdo {
 
     // Forward declare RATGDOClient
     class RATGDOClient;
 
+    static const uint8_t CODE_LENGTH = 19;
+
     struct cmd {
         uint64_t fixed;
         uint32_t data;