diff --git a/lax/lichens/sciencerun1.py b/lax/lichens/sciencerun1.py
index 1acec42..3507eb9 100644
--- a/lax/lichens/sciencerun1.py
+++ b/lax/lichens/sciencerun1.py
@@ -37,7 +37,8 @@ def __init__(self):
             S1SingleScatter(),
             S1AreaFractionTop(),
             S2PatternLikelihood(),
-            S2Tails()
+            S2Tails(),
+            InteractionPeaksBiggest()
         ]
 
 
@@ -157,6 +158,8 @@ def pre(self, df):
 
 InteractionExists = sciencerun0.InteractionExists
 
+InteractionPeaksBiggest = sciencerun0.InteractionPeaksBiggest
+
 S1LowEnergyRange = sciencerun0.S1LowEnergyRange
 
 S1MaxPMT = sciencerun0.S1MaxPMT