diff --git a/addons/web/static/src/js/views/calendar/calendar_model.js b/addons/web/static/src/js/views/calendar/calendar_model.js
index 39253da7bac..18a13d0157e 100644
--- a/addons/web/static/src/js/views/calendar/calendar_model.js
+++ b/addons/web/static/src/js/views/calendar/calendar_model.js
@@ -384,10 +384,10 @@ return AbstractModel.extend({
                         authorizedValues[filter.fieldName].push(f.value);
                     }
                 } else {
-                    if (!avoidValues[filter.fieldName])
-                        avoidValues[filter.fieldName] = [];
-
                     if (!f.active) {
+                        if (!avoidValues[filter.fieldName])
+                            avoidValues[filter.fieldName] = [];
+
                         avoidValues[filter.fieldName].push(f.value);
                     }
                 }