diff --git a/gamedir/Data-1.13/Scripts/StrategicTownLoyalty.lua b/gamedir/Data-1.13/Scripts/StrategicTownLoyalty.lua
index 7daf3908a..988ac11ae 100644
--- a/gamedir/Data-1.13/Scripts/StrategicTownLoyalty.lua
+++ b/gamedir/Data-1.13/Scripts/StrategicTownLoyalty.lua
@@ -176,7 +176,8 @@ function CheckConditionsForTriggeringCreatureQuest( sSectorX, sSectorY, bSectorZ
 		return -- No scifi, no creatures...
 	end	
 	
-	if ( giLairID ) then
+	-- if ( giLairID ) -> that does not work in LUA, because that is always TRUE!!
+	if ( giLairID ~= 0 ) then
 		return	-- Creature quest already begun
 	end
 	
diff --git a/gamedir/Data-UB/Scripts/StrategicTownLoyalty.lua b/gamedir/Data-UB/Scripts/StrategicTownLoyalty.lua
index fa211cb2a..3c7109341 100644
--- a/gamedir/Data-UB/Scripts/StrategicTownLoyalty.lua
+++ b/gamedir/Data-UB/Scripts/StrategicTownLoyalty.lua
@@ -176,7 +176,8 @@ function CheckConditionsForTriggeringCreatureQuest( sSectorX, sSectorY, bSectorZ
 		return -- No scifi, no creatures...
 	end	
 	
-	if ( giLairID ) then
+	-- if ( giLairID ) -> that does not work in LUA, because that is always TRUE!!
+	if ( giLairID ~= 0 ) then
 		return	-- Creature quest already begun
 	end
 	
diff --git a/gamedir/Data/Scripts/StrategicTownLoyalty.lua b/gamedir/Data/Scripts/StrategicTownLoyalty.lua
index 656da151f..fd00029ac 100644
--- a/gamedir/Data/Scripts/StrategicTownLoyalty.lua
+++ b/gamedir/Data/Scripts/StrategicTownLoyalty.lua
@@ -175,7 +175,8 @@ function CheckConditionsForTriggeringCreatureQuest( sSectorX, sSectorY, bSectorZ
 		return -- No scifi, no creatures...
 	end	
 	
-	if ( giLairID ) then
+	-- if ( giLairID ) -> that does not work in LUA, because that is always TRUE!!
+	if ( giLairID ~= 0 ) then
 		return	-- Creature quest already begun
 	end