diff --git a/Scripts/DCS-BIOS/lib/meta_files/DCS_API_defs.lua b/Scripts/DCS-BIOS/lib/meta_files/DCS_API_defs.lua
index ca726fbd2..098dead11 100644
--- a/Scripts/DCS-BIOS/lib/meta_files/DCS_API_defs.lua
+++ b/Scripts/DCS-BIOS/lib/meta_files/DCS_API_defs.lua
@@ -248,8 +248,8 @@ function LoCoordinatesToGeoCoordinates(x, z) end
 --- @field z number
 AccelerationUnit = {}
 
---- Returns G Load
---- @return AccelerationUnit
+--- Returns G Load. May be null when the user has the Game Master slot selected.
+--- @return AccelerationUnit?
 function LoGetAccelerationUnits() end
 
 --- Returns ADI pitch, band, yaw
diff --git a/Scripts/DCS-BIOS/lib/modules/aircraft_modules/FC3.lua b/Scripts/DCS-BIOS/lib/modules/aircraft_modules/FC3.lua
index c780c2b89..425e5cfb5 100644
--- a/Scripts/DCS-BIOS/lib/modules/aircraft_modules/FC3.lua
+++ b/Scripts/DCS-BIOS/lib/modules/aircraft_modules/FC3.lua
@@ -356,7 +356,8 @@ end)
 FC3:addExportHook(function()
 	--[[G Load]]
 	local plane = GetPlaneName()
-	gload = LoGetAccelerationUnits().y or 0
+	local acceleration_units = LoGetAccelerationUnits()
+	gload = acceleration_units and acceleration_units.y or 0
 	gload_bar = BarGLoad(gload) or 0
 
 	-- G LOAD