diff -r d3e9f3423ef3 -r 071dcdf33f86 share/hedgewars/Data/Scripts/TargetPractice.lua
--- a/share/hedgewars/Data/Scripts/TargetPractice.lua	Wed Mar 07 23:52:45 2018 +0100
+++ b/share/hedgewars/Data/Scripts/TargetPractice.lua	Thu Mar 08 00:18:32 2018 +0100
@@ -138,7 +138,8 @@
 
 	_G.onGameInit = function()
 		Seed = 1
-		GameFlags = gfDisableWind + gfInfAttack + gfOneClanMode + solid + artillery
+		ClearGameFlags()
+		EnableGameFlags(gfDisableWind, gfInfAttack, gfOneClanMode, solid, artillery)
 		TurnTime = params.time
 		Map = params.map
 		Theme = params.theme