diff --git a/homeassistant/components/binary_sensor/__init__.py b/homeassistant/components/binary_sensor/__init__.py
index 844bc609bfd..c51b30d8b7c 100644
--- a/homeassistant/components/binary_sensor/__init__.py
+++ b/homeassistant/components/binary_sensor/__init__.py
@@ -64,7 +64,7 @@ class BinarySensorDevice(Entity):
 
     @property
     def sensor_class(self):
-        """Return the class of this sensor, from SENSOR_CASSES."""
+        """Return the class of this sensor, from SENSOR_CLASSES."""
         return None
 
     @property
diff --git a/homeassistant/components/binary_sensor/bloomsky.py b/homeassistant/components/binary_sensor/bloomsky.py
index 3f18af03013..ce24a0c1015 100644
--- a/homeassistant/components/binary_sensor/bloomsky.py
+++ b/homeassistant/components/binary_sensor/bloomsky.py
@@ -56,6 +56,11 @@ class BloomSkySensor(BinarySensorDevice):
         """Unique ID for this sensor."""
         return self._unique_id
 
+    @property
+    def sensor_class(self):
+        """Return the class of this sensor, from SENSOR_CLASSES."""
+        return SENSOR_TYPES.get(self._sensor_name)
+
     @property
     def is_on(self):
         """If binary sensor is on."""