diff --git a/library/Icingadb/Widget/ItemList/StateListItem.php b/library/Icingadb/Widget/ItemList/StateListItem.php
index a857a7ee1..161b40f75 100644
--- a/library/Icingadb/Widget/ItemList/StateListItem.php
+++ b/library/Icingadb/Widget/ItemList/StateListItem.php
@@ -99,6 +99,8 @@ protected function createTimestamp(): ?BaseHtmlElement
         } elseif ($this->state->last_state_change !== null && $this->state->last_state_change->getTimestamp() > 0) {
             return new TimeSince($this->state->last_state_change->getTimestamp());
         }
+
+        return null;
     }
 
     protected function assemble()