diff --git a/OpenSim/Region/CoreModules/World/Terrain/FileLoaders/BMP.cs b/OpenSim/Region/CoreModules/World/Terrain/FileLoaders/BMP.cs
index fb57c8275b..8b95a339ff 100644
--- a/OpenSim/Region/CoreModules/World/Terrain/FileLoaders/BMP.cs
+++ b/OpenSim/Region/CoreModules/World/Terrain/FileLoaders/BMP.cs
@@ -61,7 +61,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain.FileLoaders
         {
             Bitmap colours = CreateGrayscaleBitmapFromMap(map);
 
-            colours.Save(stream, ImageFormat.Png);
+            colours.Save(stream, ImageFormat.Bmp);
         }
 
         /// <summary>