diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index 39c63dee5..520eeded5 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -84,7 +84,7 @@ if (PCB STREQUAL X10)
     set(USB_CHARGER YES)
     set(DEFAULT_THEME "DARKBLUE")
     set(SBUS_TRAINER ON)
-    set(AUX_SERIAL OFF) # todo ON
+    set(AUX_SERIAL ON)
     if (NOT BLUETOOTH AND NOT INTERNAL_GPS)
       set(AUX2_SERIAL OFF) # todo ON
     endif()
diff --git a/radio/src/targets/horus/board.h b/radio/src/targets/horus/board.h
index 3d8a9115c..eb518f58c 100644
--- a/radio/src/targets/horus/board.h
+++ b/radio/src/targets/horus/board.h
@@ -699,13 +699,13 @@ void bluetoothWriteWakeup();
 uint8_t bluetoothIsWriting();
 void bluetoothDisable();
 
-//#if defined(__cplusplus)
-//#include "fifo.h"
-//#include "dmafifo.h"
-//extern DMAFifo<512> telemetryFifo;
-//typedef DMAFifo<32> AuxSerialRxFifo;
-//extern AuxSerialRxFifo auxSerialRxFifo;
-//extern volatile uint32_t externalModulePort;
-//#endif
+#if defined(__cplusplus)
+#include "fifo.h"
+#include "dmafifo.h"
+extern DMAFifo<512> telemetryFifo;
+typedef DMAFifo<32> AuxSerialRxFifo;
+extern AuxSerialRxFifo auxSerialRxFifo;
+extern volatile uint32_t externalModulePort;
+#endif
 
 #endif // _BOARD_H_