diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/AbstractFetchOperation.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/AbstractFetchOperation.java
index 8d0abdd3d..1f752954c 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/AbstractFetchOperation.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/AbstractFetchOperation.java
@@ -92,6 +92,7 @@ public abstract class AbstractFetchOperation extends AbstractHuamiOperation {
         }
         fetchCount++;
 
+        // TODO: this probably returns null when device is not connected/initialized yet!
         characteristicActivityData = getCharacteristic(HuamiService.UUID_CHARACTERISTIC_5_ACTIVITY_DATA);
         builder.notify(characteristicActivityData, false);