diff --git a/frontend/src/TileMap.elm b/frontend/src/TileMap.elm
index e9a63df..e863ec0 100644
--- a/frontend/src/TileMap.elm
+++ b/frontend/src/TileMap.elm
@@ -61,7 +61,7 @@ reflect c = Coord -c.x -c.y
 
 -- translate : a -> a -> a
 translate base offset =
-    { base | x = (base.x + offset.x), y = (base.y + offset.y) }
+    { x = (base.x + offset.x), y = (base.y + offset.y) }
 
 translatePixels : Coord -> ZoomLevel -> (Int, Int) -> Coord
 translatePixels old z (x, y) = translate old (pixelsToCoord z (x, y))