diff --git a/src/dialog.cc b/src/dialog.cc
index fc5798f..bf2922a 100644
--- a/src/dialog.cc
+++ b/src/dialog.cc
@@ -429,7 +429,7 @@ int a_Dialog_user_password(const char *title, const char *msg,
    /* window is resized below */
    if (!(title && *title))
       title = "Flenser: User/Password";
-   Fl_Window *window = new Fl_Window(window_w,window_h,title);
+   auto window = std::make_unique< Fl_Window >(window_w,window_h,title);
    Fl_Group::current(0);
    window->user_data(NULL);
 
@@ -479,7 +479,7 @@ int a_Dialog_user_password(const char *title, const char *msg,
    window_h = y;
    window->size(window_w, window_h);
    window->size_range(window_w, window_h, window_w, window_h);
-   window->resizable(window);
+   window->resizable(window.get());
 
    window->show();
    while (window->shown())
@@ -495,7 +495,6 @@ int a_Dialog_user_password(const char *title, const char *msg,
       _MSG("a_Dialog_user_passwd: ok = %d\n", ok);
       (*cb)(user, password, vp);
    }
-   delete window;
 
    return ok;
 }