diff --git a/project/Core/Src/modbus_tcp.c b/project/Core/Src/modbus_tcp.c
index 4fcadb0..019fbc8 100644
--- a/project/Core/Src/modbus_tcp.c
+++ b/project/Core/Src/modbus_tcp.c
@@ -11,7 +11,7 @@
 #include "log.h"
 
 // Defines
-#define MAX_REG          250
+#define MAX_REG          REG_LENGTH
 #define EXTENSION_LENGTH 4
 #define TEXT_LENGTH      200
 #define MULTIPLE_REG     0x10