diff --git a/SQF/dayz_code/actions/AdvancedTrading/functions/z_at_calcFreeSpace.sqf b/SQF/dayz_code/actions/AdvancedTrading/functions/z_at_calcFreeSpace.sqf
index b6922a569..51b4fc775 100644
--- a/SQF/dayz_code/actions/AdvancedTrading/functions/z_at_calcFreeSpace.sqf
+++ b/SQF/dayz_code/actions/AdvancedTrading/functions/z_at_calcFreeSpace.sqf
@@ -75,11 +75,11 @@ if (_object isKindOf "Bag_Base_EP1") then {
 	} count _normalWeaps;
 
 	//transportMaxMagazines is the same as total number of 1x slots in backpack
-	_totalBagSlots = getNumber (configFile >> "CfgVehicles" >> (typeOf _backpack) >> "transportMaxMagazines");
+	_totalBagSlots = getNumber (configFile >> "CfgVehicles" >> (typeOf _object) >> "transportMaxMagazines");
 	
 	_alreadyInBackpack = (10 * _currentPrim) + (5 * _currentSec) + _currentTool + count(_normalMags);
 	_totalNewSpace = 10 * _primaryToBuy + 5 * _sidearmToBuy + _toolsToBuy + _toBuyTotalMags;
 	_totalSpace = _alreadyInBackpack + _totalNewSpace;
 };
 
-[_totalSpace,_allowedMags,_allowedWeapons,_allowedBackpacks,_totalBagSlots,_normalMags,_normalWeaps,_normalBags]
\ No newline at end of file
+[_totalSpace,_allowedMags,_allowedWeapons,_allowedBackpacks,_totalBagSlots,_normalMags,_normalWeaps,_normalBags]