diff --git a/VectoCore/Utils/DoubleExtensionMethods.cs b/VectoCore/Utils/DoubleExtensionMethods.cs
index d193b704480cc06c3f913a06bd391a599b4d60d9..bc3c762ffe1b6050d7246aaa2431230c547c23db 100644
--- a/VectoCore/Utils/DoubleExtensionMethods.cs
+++ b/VectoCore/Utils/DoubleExtensionMethods.cs
@@ -103,7 +103,8 @@ namespace TUGraz.VectoCore.Utils
 
 		public static MeterPerSecond KMPHtoMeterPerSecond(this double self)
 		{
-			return self.SI().Kilo.Meter.Per.Hour.Cast<MeterPerSecond>();
+			return SI<MeterPerSecond>(self / 3.6);
+			//return self.SI().Kilo.Meter.Per.Hour.Cast<MeterPerSecond>();
 		}
 
 		public static double ToRadian(this double self)