diff --git a/UI/WebServerResources/js/Scheduler/Attendees.service.js b/UI/WebServerResources/js/Scheduler/Attendees.service.js
index 3685c7b76..67d050413 100644
--- a/UI/WebServerResources/js/Scheduler/Attendees.service.js
+++ b/UI/WebServerResources/js/Scheduler/Attendees.service.js
@@ -631,9 +631,11 @@
       _this.currentEntries = _.flatMap(_this.component.organizer.freebusy[startDay]);
       for (i = 0; i < _this.component.attendees.length; i++) {
         attendee = _this.component.attendees[i];
-        attendeeEntries = _.flatMap(attendee.freebusy[startDay]);
-        for (j = 0; j < _this.currentEntries.length; j++) {
-          _this.currentEntries[j] += attendeeEntries[j];
+        if (attendee.role !== Attendees.ROLES.NON_PARTICIPANT) {
+          attendeeEntries = _.flatMap(attendee.freebusy[startDay]);
+          for (j = 0; j < _this.currentEntries.length; j++) {
+            _this.currentEntries[j] += attendeeEntries[j];
+          }
         }
       }
     });