diff --git a/include/darwin_registers.h b/include/darwin_registers.h
index cfa36fc7a872651b1e0fdbf91d7f67722b9e7810..b84afcc7e78db9bde69d3b2fa67e03b84805ef40 100644
--- a/include/darwin_registers.h
+++ b/include/darwin_registers.h
@@ -752,7 +752,7 @@ typedef enum {
 #define      STAIRS_BASE_ADDRESS     0x0252
 #define      STAIRS_MEM_LENGTH       1
 #define      STAIRS_EEPROM_ADDRESS   0x0066
-#define      STAIRS_EEPROM_LENGTH    30
+#define      STAIRS_EEPROM_LENGTH    35
 #define      STAIRS_START_UP         0x01
 #define      STAIRS_START_DOWN       0x02
 #define      STAIRS_STOP             0x04