diff --git a/homeassistant/components/alarm_control_panel/manual.py b/homeassistant/components/alarm_control_panel/manual.py
index 0a79d74d686077..0bbbd0689e2665 100644
--- a/homeassistant/components/alarm_control_panel/manual.py
+++ b/homeassistant/components/alarm_control_panel/manual.py
@@ -310,7 +310,15 @@ def device_state_attributes(self):
 
     async def async_added_to_hass(self):
         """Run when entity about to be added to hass."""
+        await super().async_added_to_hass()
         state = await self.async_get_last_state()
         if state:
-            self._state = state.state
-            self._state_ts = state.last_updated
+            if state.state == STATE_ALARM_PENDING and \
+                    hasattr(state, 'attributes') and \
+                    state.attributes['pre_pending_state']:
+                # If in pending state, we return to the pre_pending_state
+                self._state = state.attributes['pre_pending_state']
+                self._state_ts = dt_util.utcnow()
+            else:
+                self._state = state.state
+                self._state_ts = state.last_updated