diff --git a/tetris/modes/square.lua b/tetris/modes/square.lua
index 07bffc7..d2beaef 100644
--- a/tetris/modes/square.lua
+++ b/tetris/modes/square.lua
@@ -17,6 +17,9 @@ function SquareMode:new()
     self.enable_hard_drop = true
     self.enable_hold = true
     self.next_queue_length = 3
+
+    self.irs = false
+    self.ihs = false
 end
 
 function SquareMode:initialize(ruleset)