diff --git a/src/ui/SurfingMinigame.lua b/src/ui/SurfingMinigame.lua
index 5eac657a..846bd1a3 100644
--- a/src/ui/SurfingMinigame.lua
+++ b/src/ui/SurfingMinigame.lua
@@ -484,7 +484,7 @@ function SurfingMinigame.new(game, onDone, skipTitle)
   -- Linear cols mirror kept for unit tests only
   self.cols = {}
   for c = 0, 10 do
-    self.cols[c] = flatCol
+    self.cols[c] = { pat = WAVE_PATTERNS[0x00], hl = FLAT_WATER_Y, hr = FLAT_WATER_Y }
   end
   self.colTail = 10