diff --git a/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp b/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp
index 46c977731..ffdb1755b 100644
--- a/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp
+++ b/companion/src/firmwares/opentx/simulator/opentxsimulator.cpp
@@ -298,6 +298,7 @@ namespace NAMESPACE {
 #include "radio/src/thirdparty/Lua/src/lauxlib.c"
 #include "radio/src/thirdparty/Lua/src/ltablib.c"
 #include "radio/src/thirdparty/Lua/src/lcorolib.c"
+#include "radio/src/thirdparty/Lua/src/liolib.c"
 #endif
 
 int16_t g_anas[NUM_STICKS+NUM_POTS];