diff --git a/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs b/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs
index de2c3fc500..74a4ea7877 100644
--- a/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs
+++ b/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs
@@ -327,7 +327,7 @@ namespace OpenSim.Region.OptionalModules.MaterialsDemoModule
                     return new UUID(md5.ComputeHash(ms), 0);
         }
 
-        public static OSD ZCompressOSD(OSD inOsd, bool useHeader = true)
+        public static OSD ZCompressOSD(OSD inOsd, bool useHeader)
         {
             OSD osd = null;