diff --git a/templates/partials/sparkline.html b/templates/partials/sparkline.html
index 529a79d..9752940 100644
--- a/templates/partials/sparkline.html
+++ b/templates/partials/sparkline.html
@@ -74,7 +74,7 @@ M{% for value, position in lower_points %}{{ (((position * vb_width) + margin) |
             <button class="progress-action {% if forecast_enabled %}is-active{% endif %}"
                 aria-pressed="{{ 'true' if forecast_enabled else 'false' }}"
                 hx-get="{{ url_for('get_exercise_progress_for_user', person_id=person_id, exercise_id=exercise_id, epoch=selected_epoch, forecast='false' if forecast_enabled else 'true', forecast_weeks=forecast_weeks, forecast_reps=forecast_target_reps) }}"
-                hx-include="#svg-plot-{{ unique_id }} [name='min_date'], #svg-plot-{{ unique_id }} [name='max_date']"
+                {% if selected_epoch == 'Custom' %}hx-include="#svg-plot-{{ unique_id }} [name='min_date'], #svg-plot-{{ unique_id }} [name='max_date']"{% endif %}
                 hx-target="#svg-plot-{{ unique_id }}" hx-swap="outerHTML">Forecast {{ 'on' if forecast_enabled else 'off' }}</button>
         </div>
     </div>