diff --git a/companion/src/firmwares/opentx/opentxGruvin9xsimulator.cpp b/companion/src/firmwares/opentx/opentxGruvin9xsimulator.cpp
index 4f800df8f..70e4b31ec 100644
--- a/companion/src/firmwares/opentx/opentxGruvin9xsimulator.cpp
+++ b/companion/src/firmwares/opentx/opentxGruvin9xsimulator.cpp
@@ -48,6 +48,7 @@
 #define GPS
 #define FAI_CHOICE
 #define FRSKY_STICKS
+#define SAFETY_CHANNEL_FUNCTION
 
 #define EEPROM_VARIANT 3
 
diff --git a/companion/src/firmwares/opentx/opentxM128simulator.cpp b/companion/src/firmwares/opentx/opentxM128simulator.cpp
index ed16ffa4a..a04496e71 100644
--- a/companion/src/firmwares/opentx/opentxM128simulator.cpp
+++ b/companion/src/firmwares/opentx/opentxM128simulator.cpp
@@ -48,6 +48,7 @@
 #define FRSKY_STICKS
 #define DSM2
 #define DSM2_PPM
+#define SAFETY_CHANNEL_FUNCTION
 
 #define EEPROM_VARIANT SIMU_M128_VARIANTS
 #define GAUGES
diff --git a/companion/src/firmwares/opentx/opentxM64simulator.cpp b/companion/src/firmwares/opentx/opentxM64simulator.cpp
index 3f90d772c..fd0f51fdc 100644
--- a/companion/src/firmwares/opentx/opentxM64simulator.cpp
+++ b/companion/src/firmwares/opentx/opentxM64simulator.cpp
@@ -50,6 +50,7 @@
 #define GPS
 #define FAI_CHOICE
 #define FRSKY_STICKS
+#define SAFETY_CHANNEL_FUNCTION
 
 #define EEPROM_VARIANT SIMU_STOCK_VARIANTS
 #define GAUGES
diff --git a/companion/src/firmwares/opentx/opentxSky9xsimulator.cpp b/companion/src/firmwares/opentx/opentxSky9xsimulator.cpp
index 49b856e1b..2c36ab434 100644
--- a/companion/src/firmwares/opentx/opentxSky9xsimulator.cpp
+++ b/companion/src/firmwares/opentx/opentxSky9xsimulator.cpp
@@ -54,6 +54,7 @@
 #define GPS
 #define FAI_CHOICE
 #define FRSKY_STICKS
+#define SAFETY_CHANNEL_FUNCTION
 
 #define NUM_POTS  3
 #define EEPROM_VARIANT 3
diff --git a/companion/src/firmwares/opentx/opentxTaranisSimulator.cpp b/companion/src/firmwares/opentx/opentxTaranisSimulator.cpp
index 83016c547..5194e2c2e 100644
--- a/companion/src/firmwares/opentx/opentxTaranisSimulator.cpp
+++ b/companion/src/firmwares/opentx/opentxTaranisSimulator.cpp
@@ -54,6 +54,7 @@
 #define EEPROM_VARIANT 3
 #define HAPTIC
 #define REVPLUS
+#define SAFETY_CHANNEL_FUNCTION
 
 #define NUM_POTS  5