diff --git a/radio/src/targets/taranis/trainer_driver.cpp b/radio/src/targets/taranis/trainer_driver.cpp
index 4094edfd1..7e56b08fb 100644
--- a/radio/src/targets/taranis/trainer_driver.cpp
+++ b/radio/src/targets/taranis/trainer_driver.cpp
@@ -249,8 +249,10 @@ extern "C" void HEARTBEAT_USART_IRQHandler()
   while (status & (USART_FLAG_RXNE | USART_FLAG_ERRORS)) {
     data = HEARTBEAT_USART->DR;
 
-    if (!(status & USART_FLAG_ERRORS))
-      sbusFifo.push(data);
+    if (!(status & USART_FLAG_ERRORS)) {
+      if (currentTrainerMode == TRAINER_MODE_MASTER_SBUS_EXTERNAL_MODULE)
+        sbusFifo.push(data);
+    }
 
     status = HEARTBEAT_USART->SR;
   }