diff --git a/docs/core/entity/sensor.md b/docs/core/entity/sensor.md
index 1e26dca3..d5e2011a 100644
--- a/docs/core/entity/sensor.md
+++ b/docs/core/entity/sensor.md
@@ -66,7 +66,7 @@ If specifying a device class, your sensor entity will need to also return the co
 | `SensorDeviceClass.POWER_FACTOR` | %, None | Power Factor
 | `SensorDeviceClass.PRECIPITATION` | cm, in, mm | Accumulated precipitation
 | `SensorDeviceClass.PRECIPITATION_INTENSITY` | in/d, in/h, mm/d, mm/h | Precipitation intensity
-| `SensorDeviceClass.PRESSURE` | cbar, bar, hPa, inHg, kPa, mbar, Pa, psi | Pressure.
+| `SensorDeviceClass.PRESSURE` | cbar, bar, hPa, mmHg, inHg, kPa, mbar, Pa, psi | Pressure.
 | `SensorDeviceClass.REACTIVE_POWER` | var | Reactive power |
 | `SensorDeviceClass.SIGNAL_STRENGTH` | dB, dBm | Signal strength
 | `SensorDeviceClass.SOUND_PRESSURE` | dB, dBA | Sound pressure