diff --git a/zscript/flakcannon.zsc b/zscript/flakcannon.zsc
index 6167786..ce69e3f 100644
--- a/zscript/flakcannon.zsc
+++ b/zscript/flakcannon.zsc
@@ -246,7 +246,7 @@ Class FlakChunk : Actor
 		if ( lifetics > 3 )
 		{
 			lifetics = 0;
-			if ( frame < 11 ) frame += 1;
+			if ( frame < 11 ) frame++;
 		}
 		lifetime += lifespeed;
 		if ( (waterlevel <= 0) && (frame < 10) && !(lifetics%2) )
diff --git a/zscript/pulsegun.zsc b/zscript/pulsegun.zsc
index 18959d1..3b82284 100644
--- a/zscript/pulsegun.zsc
+++ b/zscript/pulsegun.zsc
@@ -525,7 +525,7 @@ Class StarterBolt : PulseBolt
 		SetOrigin(origin,true);
 		A_SetAngle(target.angle);
 		A_SetPitch(target.BulletSlope());
-		frame += 1;
+		frame++;
 		if ( frame > 4 ) frame = 0;
 		CheckBeam((cos(angle)*cos(pitch),sin(angle)*cos(pitch),-sin(pitch)));
 	}
diff --git a/zscript/warheadlauncher.zsc b/zscript/warheadlauncher.zsc
index b24ed81..eeccc6e 100644
--- a/zscript/warheadlauncher.zsc
+++ b/zscript/warheadlauncher.zsc
@@ -54,7 +54,7 @@ Class ShockWave : Actor
 		if ( !t ) t = ThinkerIterator.Create("Actor");
 		icount++;
 		if ( icount == 4 ) Spawn("WarheadSubExplosion",pos);
-		lifespan -= 1;
+		lifespan--;
 		alpha -= 1./ReactionTime;
 		shocksize = 13*(ReactionTime-lifespan)+3.5/(lifespan/ReactionTime+0.05);
 		A_SetScale(shocksize*0.25);