diff --git a/templates/qommon/forms/widgets/famille-reservations-par-semaine.html b/templates/qommon/forms/widgets/famille-reservations-par-semaine.html
index 1adbde4f..5f1ca25a 100644
--- a/templates/qommon/forms/widgets/famille-reservations-par-semaine.html
+++ b/templates/qommon/forms/widgets/famille-reservations-par-semaine.html
@@ -34,6 +34,8 @@
    {% if widget.readonly or option.disabled %}disabled{% endif %}
    {% for attr in widget.attrs.items %}{{attr.0}}="{{attr.1}}"{% endfor %}
    type="checkbox"
+   data-event-id="{{ option.options.id }}"
+   data-overlaps="{{ option.options.overlaps|join:" " }}"
    {% if widget.readonly %}value="yes" disabled
    {% else %}name="{{ option.name }}" value="yes"
        {% endif %}><span>{{ option.options.label }}</span></label>
@@ -198,6 +200,17 @@ $('.template-famille-reservations-par-semaine li.day-title').each(function(idx,
     $(elem).hide();
   }
 });
+/* check overlaps */
+$('.template-famille-reservations-par-semaine input').on('change', function() {
+  if ($(this).is(':checked')) {
+    $(this).parents('ul').find("input[data-overlaps~='"+$(this).data('event-id')+"']").prop('checked', false);
+  }
+});
+$('.template-famille-reservations-par-semaine input:disabled').each(function(index) {
+  if ($(this).attr('checked')) {
+    $(this).parents('ul').find("input[data-overlaps~='"+$(this).data('event-id')+"']").prop('disabled', true);
+  }
+});
 /* init first week shown */
 var $cell = $('.template-famille-reservations-par-semaine');
 $cell.find('li').removeClass('shown');
diff --git a/templates/qommon/forms/widgets/famille-reservations-recurrentes.html b/templates/qommon/forms/widgets/famille-reservations-recurrentes.html
index 84688f2d..d1ed60a6 100644
--- a/templates/qommon/forms/widgets/famille-reservations-recurrentes.html
+++ b/templates/qommon/forms/widgets/famille-reservations-recurrentes.html
@@ -12,6 +12,8 @@
    {% elif widget.readonly or option.disabled %}disabled{% endif %}
    {% for attr in widget.attrs.items %}{{attr.0}}="{{attr.1}}"{% endfor %}
    type="checkbox"
+   data-event-id="{{ option.options.id }}"
+   data-overlaps="{{ option.options.overlaps|join:" " }}"
    {% if widget.readonly %}value="yes" disabled
    {% else %}name="{{ option.name }}" value="yes"
    {% endif %}><span>{{ option.options.label }}</span></label>
@@ -77,4 +79,12 @@
         background: #3c3;
 }
 </style>
+<script>
+/* check overlaps */
+$('.template-famille-reservations-recurrentes input').on('change', function() {
+  if ($(this).is(':checked')) {
+    $(this).parents('ul').find("input[data-overlaps~='"+$(this).data('event-id')+"']").prop('checked', false);
+  }
+});
+</script>
 {% endblock %}