diff --git a/modules/mol/alg/src/molck.hh b/modules/mol/alg/src/molck.hh
index 69dc0d5a824a423b0a60cfd16b9f5f8dd5f1abcd..fc7f140ceea1cf2c6f9a5f9c19de4bb0386050e2 100644
--- a/modules/mol/alg/src/molck.hh
+++ b/modules/mol/alg/src/molck.hh
@@ -65,7 +65,6 @@ struct MolckSettings{
   public:
     std::string ToString(){
       std::string rep = "MolckSettings(rm_unk_atoms=" + BoolToString(rm_unk_atoms) +
-        ", rm_unk_atoms=" + BoolToString(rm_unk_atoms) +
         ", rm_non_std=" + BoolToString(rm_non_std) +
         ", rm_hyd_atoms=" + BoolToString(rm_hyd_atoms) +
         ", rm_oxt_atoms=" + BoolToString(rm_oxt_atoms) +