diff --git a/src/main/java/eu/siacs/conversations/services/NotificationService.java b/src/main/java/eu/siacs/conversations/services/NotificationService.java
index 037ccb606bdb6b6a996a4522610ba32e97f0f0b5..3b5e7edaa12b12df5e39d299cb8153bae7db1c89 100644
--- a/src/main/java/eu/siacs/conversations/services/NotificationService.java
+++ b/src/main/java/eu/siacs/conversations/services/NotificationService.java
@@ -1609,9 +1609,11 @@ public class NotificationService {
         intent.setAction(XmppConnectionService.ACTION_CLEAR_MISSED_CALL_NOTIFICATION);
         if (conversation != null) {
             intent.putExtra("uuid", conversation.getUuid());
-            return PendingIntent.getService(mXmppConnectionService, generateRequestCode(conversation, 21), intent, 0);
+            return PendingIntent.getService(mXmppConnectionService, generateRequestCode(conversation, 21), intent,
+                s() ? PendingIntent.FLAG_IMMUTABLE : 0);
         }
-        return PendingIntent.getService(mXmppConnectionService, 1, intent, 0);
+        return PendingIntent.getService(mXmppConnectionService, 1, intent,
+                s() ? PendingIntent.FLAG_IMMUTABLE : 0);
     }
 
     private PendingIntent createReplyIntent(