diff --git a/=BTC=co@30_Hearts_and_Minds.Altis/core/fnc/chem/propagate.sqf b/=BTC=co@30_Hearts_and_Minds.Altis/core/fnc/chem/propagate.sqf
index 79b6f0eea..51ee18c01 100644
--- a/=BTC=co@30_Hearts_and_Minds.Altis/core/fnc/chem/propagate.sqf
+++ b/=BTC=co@30_Hearts_and_Minds.Altis/core/fnc/chem/propagate.sqf
@@ -22,10 +22,12 @@ Author:
 ---------------------------------------------------------------------------- */
 
 params [
-    ["_item", objNull, [objNull]],
+    ["_item", objNull, [objNull, ""]],
     ["_vehicle", objNull, [objNull]]
 ];
 
+if (_item isEqualType "") exitWith {_this};
+
 if (_item in btc_chem_contaminated) then {
     if ((btc_chem_contaminated pushBackUnique _vehicle) > -1) then {
         publicVariable "btc_chem_contaminated";