diff --git a/gstreamer-sharp/IndexEntry.custom b/gstreamer-sharp/IndexEntry.custom
index 577534783a..27ec3869ee 100644
--- a/gstreamer-sharp/IndexEntry.custom
+++ b/gstreamer-sharp/IndexEntry.custom
@@ -1,4 +1,4 @@
-protected virtual GLib.Opaque Copy (IntPtr raw)
+protected override GLib.Opaque Copy (IntPtr raw)
 {
   return GLib.Opaque.GetOpaque (raw, typeof (Gst.IndexEntry), true);
 }