diff --git a/homeassistant/components/sensor/__init__.py b/homeassistant/components/sensor/__init__.py
index e11ace9749c..89963118300 100644
--- a/homeassistant/components/sensor/__init__.py
+++ b/homeassistant/components/sensor/__init__.py
@@ -7,8 +7,8 @@ import voluptuous as vol
 
 from homeassistant.const import (
     DEVICE_CLASS_BATTERY, DEVICE_CLASS_HUMIDITY, DEVICE_CLASS_ILLUMINANCE,
-    DEVICE_CLASS_POWER, DEVICE_CLASS_PRESSURE, DEVICE_CLASS_TEMPERATURE,
-    DEVICE_CLASS_TIMESTAMP)
+    DEVICE_CLASS_POWER, DEVICE_CLASS_PRESSURE, DEVICE_CLASS_SIGNAL_STRENGTH,
+    DEVICE_CLASS_TEMPERATURE, DEVICE_CLASS_TIMESTAMP)
 from homeassistant.helpers.config_validation import (  # noqa
     PLATFORM_SCHEMA, PLATFORM_SCHEMA_BASE)
 from homeassistant.helpers.entity_component import EntityComponent
@@ -24,6 +24,7 @@ DEVICE_CLASSES = [
     DEVICE_CLASS_BATTERY,  # % of battery that is left
     DEVICE_CLASS_HUMIDITY,  # % of humidity in the air
     DEVICE_CLASS_ILLUMINANCE,  # current light level (lx/lm)
+    DEVICE_CLASS_SIGNAL_STRENGTH,  # signal strength (dB/dBm)
     DEVICE_CLASS_TEMPERATURE,  # temperature (C/F)
     DEVICE_CLASS_TIMESTAMP,  # timestamp (ISO8601)
     DEVICE_CLASS_PRESSURE,  # pressure (hPa/mbar)
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 295a73a0e6c..e4f1ac95af4 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -180,6 +180,7 @@ EVENT_SCRIPT_STARTED = 'script_started'
 DEVICE_CLASS_BATTERY = 'battery'
 DEVICE_CLASS_HUMIDITY = 'humidity'
 DEVICE_CLASS_ILLUMINANCE = 'illuminance'
+DEVICE_CLASS_SIGNAL_STRENGTH = 'signal_strength'
 DEVICE_CLASS_TEMPERATURE = 'temperature'
 DEVICE_CLASS_TIMESTAMP = 'timestamp'
 DEVICE_CLASS_PRESSURE = 'pressure'