diff --git a/Loop/Managers/DeviceDataManager.swift b/Loop/Managers/DeviceDataManager.swift
index 0612a7691d..ce325e4892 100644
--- a/Loop/Managers/DeviceDataManager.swift
+++ b/Loop/Managers/DeviceDataManager.swift
@@ -727,6 +727,10 @@ class DeviceDataManager: NSObject, CarbStoreDelegate, TransmitterDelegate, WCSes
             self?.receivedRileyLinkPacketNotification(note)
         }
 
+        if let pumpState = pumpState {
+            NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(pumpStateValuesDidChange(_:)), name: PumpState.ValuesDidChangeNotification, object: pumpState)
+        }
+
         loopManager = LoopDataManager(deviceDataManager: self)
 
         watchSession?.delegate = self