diff --git a/Game/Levels/Power/L01zero_pow_zero.lean b/Game/Levels/Power/L01zero_pow_zero.lean
index c8f6818..6f51e6d 100644
--- a/Game/Levels/Power/L01zero_pow_zero.lean
+++ b/Game/Levels/Power/L01zero_pow_zero.lean
@@ -1,4 +1,5 @@
 import Game.Levels.Multiplication
+import Game.Levels.Algorithm
 import Game.MyNat.Power