diff --git a/DroneSimulator/FormMain.cs b/DroneSimulator/FormMain.cs
index ef84c4f..0e4ba60 100644
--- a/DroneSimulator/FormMain.cs
+++ b/DroneSimulator/FormMain.cs
@@ -330,7 +330,7 @@ namespace DroneSimulator
     {
       GPS.Home.Lat = (double)numericUpDown_GPS_Lat.Value;
       GPS.Home.Lon = (double)numericUpDown_GPS_Lon.Value;
-      GPS.Home.Alt = (double)numericUpDown_GPS_Alt.Value;
+      GPS.Home.Alt = (float)numericUpDown_GPS_Alt.Value;
 
       GPS.State.Fix = (byte)numericUpDown_GPS_Fix.Value;
       GPS.State.SatVisible = (byte)numericUpDown_GPS_Vis.Value;