diff --git a/mozilla/toolkit/mozapps/installer/unix/wizard/nsSetupTypeDlg.cpp b/mozilla/toolkit/mozapps/installer/unix/wizard/nsSetupTypeDlg.cpp
index 6d6b350507c..855051be47e 100644
--- a/mozilla/toolkit/mozapps/installer/unix/wizard/nsSetupTypeDlg.cpp
+++ b/mozilla/toolkit/mozapps/installer/unix/wizard/nsSetupTypeDlg.cpp
@@ -678,6 +678,7 @@ nsSetupTypeDlg::VerifyDestination()
                                  gCtx->opt->mDestination);
 
         gtk_dialog_run(GTK_DIALOG(noPermsDlg));
+        gtk_widget_destroy(noPermsDlg);
 
         return E_NO_PERMS;
       }