diff --git a/python/lsst/ip/diffim/detectAndMeasure.py b/python/lsst/ip/diffim/detectAndMeasure.py
index d226ab3fb..ff0b4031d 100644
--- a/python/lsst/ip/diffim/detectAndMeasure.py
+++ b/python/lsst/ip/diffim/detectAndMeasure.py
@@ -475,6 +475,7 @@ def __init__(self, **kwargs):
             self.makeSubtask("streakDetection")
         self.makeSubtask("findGlints")
         self.schema.addField("glint_trail", "Flag", "DiaSource is part of a glint trail.")
+        self.schema.addField("reliability", type="F", doc="Reliability score of the DiaSource")
 
         # To get the "merge_*" fields in the schema; have to re-initialize
         # this later, once we have a peak schema post-detection.