diff --git a/generator/NativeStructGen.cs b/generator/NativeStructGen.cs
index f605d4e83..f75ea0306 100644
--- a/generator/NativeStructGen.cs
+++ b/generator/NativeStructGen.cs
@@ -105,7 +105,7 @@ namespace GtkSharp.Generation
 			StreamWriter sw = gen_info.Writer;
 
 			sw.WriteLine ("\t\t[StructLayout(LayoutKind.Sequential)]");
-			sw.WriteLine ("\t\tprivate struct NativeStruct {");
+			sw.WriteLine ("\t\tprivate partial struct NativeStruct {");
 			foreach (StructField field in fields) {
 				field.Generate (gen_info, "\t\t\t");
 			}