diff --git a/behaviours/skitter_from_mouse.gd b/behaviours/skitter_from_mouse.gd
index 5e85cbe..9ea14da 100644
--- a/behaviours/skitter_from_mouse.gd
+++ b/behaviours/skitter_from_mouse.gd
@@ -38,7 +38,7 @@ func _physics_process(delta: float) -> void:
 	match state:
 		State.SCARED:
 			if len(directions) > 0:
-				var idx := Random.rng.randi_range(0, len(directions))
+				var idx := Random.rng.randi_range(0, len(directions) - 1)
 				var direction: Vector2 = directions[idx]
 				var movement: Vector2 = direction * delta * speed
 				move.emit(movement)