diff --git a/homeassistant/components/cups/sensor.py b/homeassistant/components/cups/sensor.py
index f6a5133d8a9..4af51e911a1 100644
--- a/homeassistant/components/cups/sensor.py
+++ b/homeassistant/components/cups/sensor.py
@@ -276,11 +276,11 @@ class MarkerSensor(Entity):
         if self._attributes is None:
             return None
 
-        high_level = self._attributes[self._printer]["marker-high-levels"]
+        high_level = self._attributes[self._printer].get("marker-high-levels")
         if isinstance(high_level, list):
             high_level = high_level[self._index]
 
-        low_level = self._attributes[self._printer]["marker-low-levels"]
+        low_level = self._attributes[self._printer].get("marker-low-levels")
         if isinstance(low_level, list):
             low_level = low_level[self._index]