diff --git a/src/Dodge/LevelGen.hs b/src/Dodge/LevelGen.hs
index 5df9445e0..d940d49ee 100644
--- a/src/Dodge/LevelGen.hs
+++ b/src/Dodge/LevelGen.hs
@@ -22,6 +22,8 @@ import Picture
 
 import System.Random
 
+import Control.DeepSeq (deepseq)
+
 import Control.Monad.State
 import Data.List
 import Data.Function
@@ -448,8 +450,8 @@ mvPointTowardAtSpeed speed !ep !p
     | otherwise         = p +.+ speed *.* normalizeV (ep -.- p)
 
 mvPointToward :: Point2 -> Point2 -> Point2
-mvPointToward ep p | dist p ep < 1 = ep
-                   | otherwise     = p +.+ normalizeV (ep -.- p)
+mvPointToward !ep !p | dist p ep < 1 = ep
+                     | otherwise     = p +.+ normalizeV (ep -.- p)
 
 drawAutoDoor :: Wall -> Drawing
 drawAutoDoor wl = onLayerL [levLayer WlLayer, layer2] 
@@ -488,7 +490,9 @@ autoDoorPane trigL n castShad closedPos openPos = AutoDoor
                            $ over walls (IM.adjust closeDoor n) w
         mvP !ep !p = mvPointTowardAtSpeed 2 ep p
         moveToward :: [Point2] -> Wall -> Wall
-        moveToward ps w = w & wlLine %~ zipWith mvP ps
+        moveToward !ps w = let !newPs = zipWith mvP ps $ _wlLine w
+                           in  deepseq newPs $ w {_wlLine = newPs}
+                            --deepseq ps $ w & wlLine %~ zipWith mvP ps
         openDoor = moveToward openPos
         closeDoor = moveToward closedPos
         zoneps | dist a b <= 2 * zoneSize = [zoneOfPoint $ pHalf a b]