diff --git a/homeassistant/components/fritzbox/sensor.py b/homeassistant/components/fritzbox/sensor.py
index e590f14ce89..2ae7f9dccc8 100644
--- a/homeassistant/components/fritzbox/sensor.py
+++ b/homeassistant/components/fritzbox/sensor.py
@@ -96,7 +96,9 @@ SENSOR_TYPES: Final[tuple[FritzSensorEntityDescription, ...]] = (
         device_class=SensorDeviceClass.VOLTAGE,
         state_class=SensorStateClass.MEASUREMENT,
         suitable=lambda device: device.has_powermeter,  # type: ignore[no-any-return]
-        native_value=lambda device: device.voltage / 1000 if device.voltage else 0.0,
+        native_value=lambda device: device.voltage / 1000
+        if getattr(device, "voltage", None)
+        else 0.0,
     ),
     FritzSensorEntityDescription(
         key="electric_current",
@@ -106,7 +108,7 @@ SENSOR_TYPES: Final[tuple[FritzSensorEntityDescription, ...]] = (
         state_class=SensorStateClass.MEASUREMENT,
         suitable=lambda device: device.has_powermeter,  # type: ignore[no-any-return]
         native_value=lambda device: device.power / device.voltage
-        if device.power and device.voltage
+        if device.power and getattr(device, "voltage", None)
         else 0.0,
     ),
     FritzSensorEntityDescription(