diff --git a/homeassistant/components/delijn/sensor.py b/homeassistant/components/delijn/sensor.py
index 7673e473e43..8c73fecf26e 100644
--- a/homeassistant/components/delijn/sensor.py
+++ b/homeassistant/components/delijn/sensor.py
@@ -94,6 +94,7 @@ class DeLijnPublicTransportSensor(Entity):
             self._attributes["final_destination"] = first["final_destination"]
             self._attributes["due_at_schedule"] = first["due_at_schedule"]
             self._attributes["due_at_realtime"] = first["due_at_realtime"]
+            self._attributes["is_realtime"] = first["is_realtime"]
             self._attributes["next_passages"] = self.line.passages
             self._available = True
         except (KeyError, IndexError):