diff --git a/src/main/java/cz/jzitnik/game/sprites/Air.java b/src/main/java/cz/jzitnik/game/sprites/Air.java
index a274e36..e15a412 100644
--- a/src/main/java/cz/jzitnik/game/sprites/Air.java
+++ b/src/main/java/cz/jzitnik/game/sprites/Air.java
@@ -4,7 +4,7 @@ import cz.jzitnik.tui.Sprite;
 
 public class Air extends Sprite {
     public String getSprite() {
-        throw new RuntimeException("Imposible state");
+        return "";
     }
 
     public String getSprite(int daytime) {