diff --git a/radio/src/trainer.cpp b/radio/src/trainer.cpp
index fc77431bc..c845d459c 100644
--- a/radio/src/trainer.cpp
+++ b/radio/src/trainer.cpp
@@ -192,7 +192,8 @@ static void trainer_init_module_sbus()
     auto ctx = modulePortGetCtx(sbus_trainer_mod_st->rx);
 
     sbusSetReceiveCtx(ctx, drv);
-    drv->setIdleCb(ctx, sbusFrameReceived, nullptr);
+    if (drv && drv->setIdleCb)
+      drv->setIdleCb(ctx, sbusFrameReceived, nullptr);
 
     // switch ON
     modulePortSetPower(EXTERNAL_MODULE, true);