diff --git a/gio/FileAdapter.custom b/gio/FileAdapter.custom
index 749a71c..73d4275 100644
--- a/gio/FileAdapter.custom
+++ b/gio/FileAdapter.custom
@@ -53,10 +53,12 @@ public System.Uri Uri {
 bool disposed = false;
 public void Dispose ()
 {
-	disposed = true;
-	var o = GLib.Object.GetObject (Handle, false);
-	if (o != null)
-		o.Dispose ();
+    if (!disposed) {
+	    disposed = true;
+	    var o = GLib.Object.GetObject (Handle, false);
+	    if (o != null)
+		    o.Dispose ();
+    }
 }
 
 ~FileAdapter ()