diff --git a/radio/src/targets/horus/trainer_driver.cpp b/radio/src/targets/horus/trainer_driver.cpp
index c29d28029..347084ac9 100644
--- a/radio/src/targets/horus/trainer_driver.cpp
+++ b/radio/src/targets/horus/trainer_driver.cpp
@@ -246,3 +246,8 @@ extern "C" void HEARTBEAT_USART_IRQHandler()
   }
 }
 #endif
+
+int sbusGetByte(uint8_t * byte)
+{
+  return false;
+}