diff --git a/DroneSimulator/RealMode.cs b/DroneSimulator/RealMode.cs
index d0e5d23..c5b98c5 100644
--- a/DroneSimulator/RealMode.cs
+++ b/DroneSimulator/RealMode.cs
@@ -378,7 +378,7 @@ namespace DroneSimulator
           return;
         }
 
-        if (value > MaxHeight) value = MaxHeight;
+        if (value > MaxHeight) value = -1;
         else
         {
           int noise = (int)(Noise * 1000);