diff --git a/MapControl/Shared/MapImageLayer.cs b/MapControl/Shared/MapImageLayer.cs
index c67d6a85..641d8540 100644
--- a/MapControl/Shared/MapImageLayer.cs
+++ b/MapControl/Shared/MapImageLayer.cs
@@ -23,7 +23,7 @@ using System.Windows.Threading;
 namespace MapControl
 {
     /// <summary>
-    /// Map image layer. Fills the entire viewport with a map image, e.g. provided by a Web Map Service (WMS).
+    /// Map image layer. Fills the entire viewport with a map image, e.g. provided by a Web Map Service.
     /// The image must be provided by the abstract GetImageAsync method.
     /// </summary>
     public abstract class MapImageLayer : MapPanel, IMapLayer
diff --git a/MapControl/Shared/WmsImageLayer.cs b/MapControl/Shared/WmsImageLayer.cs
index 82bfa5e4..f0363301 100644
--- a/MapControl/Shared/WmsImageLayer.cs
+++ b/MapControl/Shared/WmsImageLayer.cs
@@ -150,9 +150,10 @@ namespace MapControl
                     uri += "&FORMAT=" + Format;
                 }
 
+                var crs = GetCrsValue();
                 var rect = projection.BoundingBoxToRect(BoundingBox);
 
-                uri += "&" + GetBboxParameters(rect);
+                uri += "&" + GetBboxParameters(crs, rect);
                 uri += "&WIDTH=" + (int)Math.Round(projection.ViewportScale * rect.Width);
                 uri += "&HEIGHT=" + (int)Math.Round(projection.ViewportScale * rect.Height);
 
@@ -162,18 +163,6 @@ namespace MapControl
             return imageUri;
         }
 
-        /// <summary>
-        /// Gets a query substring for the projected bounding box, which contains the CRS and BBOX or equivalent parameters.
-        /// </summary>
-        protected virtual string GetBboxParameters(Rect bbox)
-        {
-            var crsId = GetCrsValue();
-
-            return string.Format(CultureInfo.InvariantCulture,
-                crsId == "EPSG:4326" ? "CRS={0}&BBOX={2},{1},{4},{3}" : "CRS={0}&BBOX={1},{2},{3},{4}",
-                crsId, bbox.X, bbox.Y, (bbox.X + bbox.Width), (bbox.Y + bbox.Height));
-        }
-
         /// <summary>
         /// Gets the effective value of the CRS query parameter.
         /// </summary>
@@ -197,6 +186,16 @@ namespace MapControl
             return crsId;
         }
 
+        /// <summary>
+        /// Gets a query substring for the projected bounding box, which contains the CRS and BBOX or equivalent parameters.
+        /// </summary>
+        protected virtual string GetBboxParameters(string crs, Rect bbox)
+        {
+            return string.Format(CultureInfo.InvariantCulture,
+                crs == "EPSG:4326" ? "CRS={0}&BBOX={2},{1},{4},{3}" : "CRS={0}&BBOX={1},{2},{3},{4}",
+                crs, bbox.X, bbox.Y, (bbox.X + bbox.Width), (bbox.Y + bbox.Height));
+        }
+
         private string GetRequestUri(string request)
         {
             var uri = ServiceUri.ToString();