diff --git a/src/pineko/evolve.py b/src/pineko/evolve.py
index b0e7acf5..f6d79a9e 100644
--- a/src/pineko/evolve.py
+++ b/src/pineko/evolve.py
@@ -382,7 +382,7 @@ def prepare(operator, items):
             fac1=q2,
             x1=operator.bases.targetgrid.raw,
             pids1=operator.bases.targetpids,
-            pid_basis=PyPidBasis.Pdg,
+            pid_basis=PyPidBasis.Evol,
         )
         return (info, op.operator)