diff --git a/dynamixel_base/include/dynamixel_master.h b/dynamixel_base/include/dynamixel_master.h
index 7d4ead6324b556df8ec7a3c549f092aafa8506b7..5bee28d6ed0fe82d2a70620b6ad169b9f08d8258 100644
--- a/dynamixel_base/include/dynamixel_master.h
+++ b/dynamixel_base/include/dynamixel_master.h
@@ -6,11 +6,11 @@
 #include "dynamixel2.h"
 
 
-#ifndef MAX_DYN_SLAVE_TX_BUFFER_LEN
+#ifndef MAX_DYN_MASTER_TX_BUFFER_LEN
   #define       MAX_DYN_MASTER_TX_BUFFER_LEN      1024
 #endif
 
-#ifndef MAX_DYN_SLAVE_TX_BUFFER_LEN
+#ifndef MAX_DYN_MASTER_RX_BUFFER_LEN
   #define       MAX_DYN_MASTER_RX_BUFFER_LEN      1024
 #endif