diff --git a/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp b/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp
index e659ba799..8a9fa5ccd 100644
--- a/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp
+++ b/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp
@@ -121,6 +121,7 @@ namespace NAMESPACE {
 #include "radio/src/stamp.cpp"
 #include "radio/src/maths.cpp"
 #include "radio/src/vario.cpp"
+#include "radio/src/trainer_input.cpp"
 
 #if defined(PCBTARANIS)
 #include "radio/src/bmp.cpp"