diff --git a/pyext/rivet/hepdatapatches/ATLAS_2016_I1468168.py b/pyext/rivet/hepdatapatches/ATLAS_2016_I1468168.py
--- a/pyext/rivet/hepdatapatches/ATLAS_2016_I1468168.py
+++ b/pyext/rivet/hepdatapatches/ATLAS_2016_I1468168.py
@@ -1,11 +1,11 @@
 
 def patch(path, ao):
     needs_patching = [ 
       '/REF/ATLAS_2016_I1468168/d01-x01-y01', 
       '/REF/ATLAS_2016_I1468168/d02-x01-y01'
     ]
     if path in needs_patching:
-      for p in ao.points:
-          p.xErrs = (0.5, 0.5)
+      for p in ao.points():
+          p.setErrs(1, (0.5, 0.5))
     return ao