diff --git a/src/ag-app.c b/src/ag-app.c
index 1384176..0581cd0 100644
--- a/src/ag-app.c
+++ b/src/ag-app.c
@@ -201,7 +201,11 @@ show_help(const gchar *topic, GtkWindow *parent)
     }
 
     if (!gtk_show_uri(screen, uri, gtk_get_current_event_time(), &err)) {
-        g_warning("Unable to display help: %s", err->message);
+        GtkWidget *dialog;
+
+        dialog = gtk_message_dialog_new(parent, GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK, "Unable to display help: %s", err->message);
+        gtk_dialog_run(GTK_DIALOG(dialog));
+        gtk_widget_destroy(dialog);
     }
 
     g_free(uri);
diff --git a/src/ag-window.c b/src/ag-window.c
index fee60f6..28c69a5 100644
--- a/src/ag-window.c
+++ b/src/ag-window.c
@@ -179,7 +179,11 @@ ag_window_redraw_chart(AgWindow *window)
     svg_content = ag_chart_create_svg(window->priv->chart, &err);
 
     if (svg_content == NULL) {
-        g_warning("%s", err->message);
+        GtkWidget *dialog;
+
+        dialog = gtk_message_dialog_new(GTK_WINDOW(window), 0, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK, "Unable to draw chart: %s", err->message);
+        gtk_dialog_run(GTK_DIALOG(dialog));
+        gtk_widget_destroy(dialog);
     } else {
         webkit_web_view_load_string(WEBKIT_WEB_VIEW(window->priv->tab_chart), svg_content, "image/svg+xml", "UTF-8", "file://");
         g_free(svg_content);