diff --git a/golem/core/optimisers/genetic/operators/mutation.py b/golem/core/optimisers/genetic/operators/mutation.py
index 4b0c3f9c..8c52e751 100644
--- a/golem/core/optimisers/genetic/operators/mutation.py
+++ b/golem/core/optimisers/genetic/operators/mutation.py
@@ -103,12 +103,8 @@ def _mutation(self, individual: Individual) -> Tuple[Individual, bool]:
                 new_graph = self._apply_mutations(new_graph, mutation_type)
                 is_correct_graph = self.graph_generation_params.verifier(new_graph)
                 if is_correct_graph:
-                    if isinstance(mutation_type, MutationTypesEnum):
-                        mutation_name = mutation_type.name
-                    else:
-                        mutation_name = mutation_type.__name__
                     parent_operator = ParentOperator(type_='mutation',
-                                                     operators=mutation_name,
+                                                     operators=mutation_type,
                                                      parent_individuals=individual)
                     individual = Individual(new_graph, parent_operator,
                                             metadata=self.requirements.static_individual_metadata)