diff --git a/ui/src/lib/alarmrepeated.js b/ui/src/lib/alarmrepeated.js
index baef914..27002fe 100644
--- a/ui/src/lib/alarmrepeated.js
+++ b/ui/src/lib/alarmrepeated.js
@@ -9,11 +9,15 @@ export class AlarmRepeated {
     this.id = id;
     this.weekday = weekday;
     this.time = time;
-    this.routines = routines;
+    this.routines = routines == null ? [] : routines;
     this.ignore_exceptions = ignore_exceptions;
     this.comment = comment;
     this.excepts = excepts;
     this.next_time = next_time;
+
+    if (this.routines.length < 1) {
+      this.routines.push("");
+    }
   }
 
   async delete() {
diff --git a/ui/src/lib/alarmsingle.js b/ui/src/lib/alarmsingle.js
index f8e5927..8a171b3 100644
--- a/ui/src/lib/alarmsingle.js
+++ b/ui/src/lib/alarmsingle.js
@@ -8,8 +8,12 @@ export class AlarmSingle {
   update({ id, time, routines, comment }) {
     this.id = id;
     this.time = new Date(time);
-    this.routines = routines;
+    this.routines = routines == null ? [] : routines;
     this.comment = comment;
+
+    if (this.routines.length < 1) {
+      this.routines.push("");
+    }
   }
 
   async delete() {