diff --git a/reflect/Emit/AssemblyBuilder.cs b/reflect/Emit/AssemblyBuilder.cs
index e4634d08..49f2e861 100644
--- a/reflect/Emit/AssemblyBuilder.cs
+++ b/reflect/Emit/AssemblyBuilder.cs
@@ -37,7 +37,6 @@ namespace IKVM.Reflection.Emit
 	{
 		private readonly AssemblyName name;
 		internal readonly string dir;
-		internal readonly bool mcs;
 		private readonly PermissionSet requiredPermissions;
 		private readonly PermissionSet optionalPermissions;
 		private readonly PermissionSet refusedPermissions;
@@ -69,8 +68,6 @@ namespace IKVM.Reflection.Emit
 			this.optionalPermissions = optionalPermissions;
 			this.refusedPermissions = refusedPermissions;
 			this.imageRuntimeVersion = universe.System_Object.Assembly.ImageRuntimeVersion;
-			// support for mcs specific flag
-			mcs = (access & (AssemblyBuilderAccess)0x800) != 0;
 		}
 
 		public override AssemblyName GetName()
diff --git a/reflect/Emit/TypeBuilder.cs b/reflect/Emit/TypeBuilder.cs
index 9abf77b1..11d85962 100644
--- a/reflect/Emit/TypeBuilder.cs
+++ b/reflect/Emit/TypeBuilder.cs
@@ -970,7 +970,7 @@ namespace IKVM.Reflection.Emit
 
 		internal void CheckBaked()
 		{
-			if ((typeFlags & TypeFlags.Baked) == 0 && !((AssemblyBuilder)this.Assembly).mcs)
+			if ((typeFlags & TypeFlags.Baked) == 0)
 			{
 				throw new NotSupportedException();
 			}