diff --git a/MapControl/Shared/Etrs89UtmProjection.cs b/MapControl/Shared/Etrs89UtmProjection.cs
index 757105a8..09ed8ddf 100644
--- a/MapControl/Shared/Etrs89UtmProjection.cs
+++ b/MapControl/Shared/Etrs89UtmProjection.cs
@@ -22,7 +22,7 @@ namespace MapControl
             }
 
             Zone = zone;
-            CrsId = $"EPSG:{25800 + Zone}";
+            CrsId = $"EPSG:{25800 + zone}";
 
             // GRS 1980
             EquatorialRadius = 6378137d;
diff --git a/MapControl/Shared/Nad27UtmProjection.cs b/MapControl/Shared/Nad27UtmProjection.cs
index 8c14514c..8d508993 100644
--- a/MapControl/Shared/Nad27UtmProjection.cs
+++ b/MapControl/Shared/Nad27UtmProjection.cs
@@ -22,7 +22,7 @@ namespace MapControl
             }
 
             Zone = zone;
-            CrsId = $"EPSG:{26700 + Zone}";
+            CrsId = $"EPSG:{26700 + zone}";
 
             // Clarke 1866
             EquatorialRadius = 6378206.4;
diff --git a/MapControl/Shared/Nad83UtmProjection.cs b/MapControl/Shared/Nad83UtmProjection.cs
index 0686d6ba..5e78965e 100644
--- a/MapControl/Shared/Nad83UtmProjection.cs
+++ b/MapControl/Shared/Nad83UtmProjection.cs
@@ -22,7 +22,7 @@ namespace MapControl
             }
 
             Zone = zone;
-            CrsId = $"EPSG:{26900 + Zone}";
+            CrsId = $"EPSG:{26900 + zone}";
 
             // GRS 1980
             EquatorialRadius = 6378137d;
diff --git a/MapProjections/Shared/Wgs84UtmProjection.cs b/MapProjections/Shared/Wgs84UtmProjection.cs
index 28c23fcc..bbac4b74 100644
--- a/MapProjections/Shared/Wgs84UtmProjection.cs
+++ b/MapProjections/Shared/Wgs84UtmProjection.cs
@@ -32,7 +32,7 @@ namespace MapControl.Projections
 
             Zone = zone;
             Hemisphere = hemisphere;
-            CoordinateSystem = ProjectedCoordinateSystem.WGS84_UTM(Zone, hemisphere == Hemisphere.North);
+            CoordinateSystem = ProjectedCoordinateSystem.WGS84_UTM(zone, hemisphere == Hemisphere.North);
         }
     }
 }