diff --git a/homeassistant/components/mobile_app/device_tracker.py b/homeassistant/components/mobile_app/device_tracker.py
index 22435fadc16..7fb76f3af41 100644
--- a/homeassistant/components/mobile_app/device_tracker.py
+++ b/homeassistant/components/mobile_app/device_tracker.py
@@ -145,9 +145,9 @@ class MobileAppEntity(DeviceTrackerEntity, RestoreEntity):
 
         attr = state.attributes
         data = {
-            ATTR_GPS: (attr[ATTR_LATITUDE], attr[ATTR_LONGITUDE]),
-            ATTR_GPS_ACCURACY: attr[ATTR_GPS_ACCURACY],
-            ATTR_BATTERY: attr[ATTR_BATTERY_LEVEL],
+            ATTR_GPS: (attr.get(ATTR_LATITUDE), attr.get(ATTR_LONGITUDE)),
+            ATTR_GPS_ACCURACY: attr.get(ATTR_GPS_ACCURACY),
+            ATTR_BATTERY: attr.get(ATTR_BATTERY_LEVEL),
         }
         data.update({key: attr[key] for key in attr if key in ATTR_KEYS})
         self._data = data
diff --git a/homeassistant/components/owntracks/device_tracker.py b/homeassistant/components/owntracks/device_tracker.py
index d74fea43c29..ed2749262bd 100644
--- a/homeassistant/components/owntracks/device_tracker.py
+++ b/homeassistant/components/owntracks/device_tracker.py
@@ -153,10 +153,10 @@ class OwnTracksEntity(DeviceTrackerEntity, RestoreEntity):
         attr = state.attributes
         self._data = {
             'host_name': state.name,
-            'gps': (attr[ATTR_LATITUDE], attr[ATTR_LONGITUDE]),
-            'gps_accuracy': attr[ATTR_GPS_ACCURACY],
-            'battery': attr[ATTR_BATTERY_LEVEL],
-            'source_type': attr[ATTR_SOURCE_TYPE],
+            'gps': (attr.get(ATTR_LATITUDE), attr.get(ATTR_LONGITUDE)),
+            'gps_accuracy': attr.get(ATTR_GPS_ACCURACY),
+            'battery': attr.get(ATTR_BATTERY_LEVEL),
+            'source_type': attr.get(ATTR_SOURCE_TYPE),
         }
 
     @callback