diff --git a/libraries/AP_SerialManager/AP_SerialManager.cpp b/libraries/AP_SerialManager/AP_SerialManager.cpp
index 7b805c767e..d39f488eed 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.cpp
+++ b/libraries/AP_SerialManager/AP_SerialManager.cpp
@@ -501,14 +501,6 @@ void AP_SerialManager::init()
                     uart->set_flow_control(AP_HAL::UARTDriver::FLOW_CONTROL_DISABLE);
                     break;
 
-                case SerialProtocol_Robotis:
-                    uart->begin(state[i].baudrate(),
-                                         AP_SERIALMANAGER_ROBOTIS_BUFSIZE_RX,
-                                         AP_SERIALMANAGER_ROBOTIS_BUFSIZE_TX);
-                    uart->set_unbuffered_writes(true);
-                    uart->set_flow_control(AP_HAL::UARTDriver::FLOW_CONTROL_DISABLE);
-                    break;
-
                 case SerialProtocol_SLCAN:
                     uart->begin(state[i].baudrate(),
                                          AP_SERIALMANAGER_SLCAN_BUFSIZE_RX,
diff --git a/libraries/AP_SerialManager/AP_SerialManager_config.h b/libraries/AP_SerialManager/AP_SerialManager_config.h
index 8b50422058..9fe6bb8c63 100644
--- a/libraries/AP_SerialManager/AP_SerialManager_config.h
+++ b/libraries/AP_SerialManager/AP_SerialManager_config.h
@@ -108,9 +108,6 @@
 #define AP_SERIALMANAGER_GIMBAL_BUFSIZE_RX      128
 #define AP_SERIALMANAGER_GIMBAL_BUFSIZE_TX      128
 
-#define AP_SERIALMANAGER_ROBOTIS_BUFSIZE_RX  128
-#define AP_SERIALMANAGER_ROBOTIS_BUFSIZE_TX  128
-
 // MegaSquirt EFI protocol
 #define AP_SERIALMANAGER_EFI_MS_BAUD           115
 #define AP_SERIALMANAGER_EFI_MS_BUFSIZE_RX     512