diff --git a/MAC/Services/src/PipelineControl.py b/MAC/Services/src/PipelineControl.py
index 987f5614dcea85ffdd90404fdda74f0ca2737a96..147fa1c86232fc8b791d22cdbc7c1cc1fa08416d 100755
--- a/MAC/Services/src/PipelineControl.py
+++ b/MAC/Services/src/PipelineControl.py
@@ -539,7 +539,6 @@ class PipelineControl(OTDBBusListener):
     More statusses we want to abort on.
   """
   onObservationDescribed    = onObservationAborted
-  onObservationPrepared     = onObservationAborted
   onObservationApproved     = onObservationAborted
   onObservationPrescheduled = onObservationAborted
   onObservationConflict     = onObservationAborted