diff --git a/modules/mol/alg/pymod/chain_mapping.py b/modules/mol/alg/pymod/chain_mapping.py
index 354b3f4cc8cef46969bf0912a529846d619a3a5b..d6e5d848aa30e0f50345f0bcf671d213a4020f8c 100644
--- a/modules/mol/alg/pymod/chain_mapping.py
+++ b/modules/mol/alg/pymod/chain_mapping.py
@@ -360,8 +360,6 @@ class ChainMapper:
             lddt_scorer = _lDDTDecomposer(self.target, mdl, ref_mdl_alns,
                                           inclusion_radius=inclusion_radius,
                                           thresholds = thresholds)
-            best_mapping = None
-            best_lddt = -1.0
             for mapping in _ChainMappings(self.chem_groups, chem_mapping,
                                           self.n_max_naive):
                 lDDT = lddt_scorer.lDDT(self.chem_groups, mapping)