diff --git a/tetris/rulesets/cambridge.lua b/tetris/rulesets/cambridge.lua
index 3daed34..0e4081a 100644
--- a/tetris/rulesets/cambridge.lua
+++ b/tetris/rulesets/cambridge.lua
@@ -375,7 +375,10 @@ end
 
 function CRS:attemptWallkicks(piece, new_piece, rot_dir, grid)
 
-	if piece.shape == "O" then return end
+	if piece.shape == "O" then
+		self:onPieceRotate(piece, grid)
+		return
+	end
 
 	local kicks = CRS.wallkicks[piece.shape][piece:isDropBlocked(grid)][piece.rotation][new_piece.rotation]