diff --git a/python/dune/perftool/blockstructured/vectorization.py b/python/dune/perftool/blockstructured/vectorization.py
index 7cd68f05f9445e31e01f9d9a5a1ffc47893e29d8..d514198f5c29c4cea95997adcaf44f3be456494b 100644
--- a/python/dune/perftool/blockstructured/vectorization.py
+++ b/python/dune/perftool/blockstructured/vectorization.py
@@ -318,20 +318,21 @@ def add_iname_array(knl, vec_iname):
         vector_name = vec_iname + '_vec'
 
         new_temporaries = dict()
-        new_temporaries[array_name] = DuneTemporaryVariable(array_name, managed=True, shape=(get_form_option('number_of_blocks'),),
+        new_temporaries[array_name] = DuneTemporaryVariable(array_name, managed=True,
+                                                            shape=(get_form_option('number_of_blocks'),),
                                                             scope=lp.temp_var_scope.PRIVATE, dtype=np.float64,
                                                             base_storage=vec_iname + '_buff',
                                                             _base_storage_access_may_be_aliasing=True)
-        new_temporaries[vector_name] = DuneTemporaryVariable(vector_name, managed=True, shape=(get_form_option('number_of_blocks'),),
+        new_temporaries[vector_name] = DuneTemporaryVariable(vector_name, managed=True,
+                                                             shape=(get_form_option('number_of_blocks'),),
                                                              scope=lp.temp_var_scope.PRIVATE, dtype=np.float64,
                                                              base_storage=vec_iname + '_buff',
                                                              _base_storage_access_may_be_aliasing=True)
 
-        new_insns = []
-        new_insns.append(lp.Assignment(assignee=prim.Subscript(prim.Variable(array_name), (prim.Variable(vec_iname),)),
-                                       expression=prim.Variable(vec_iname),
-                                       id='init_{}_buffer'.format(vec_iname),
-                                       within_inames=frozenset({vec_iname}), within_inames_is_final=True))
+        new_insns = [lp.Assignment(assignee=prim.Subscript(prim.Variable(array_name), (prim.Variable(vec_iname),)),
+                                   expression=prim.Variable(vec_iname),
+                                   id='init_{}_buffer'.format(vec_iname),
+                                   within_inames=frozenset({vec_iname}), within_inames_is_final=True)]
 
         replacemap = dict()
         replacemap[vec_iname] = prim.Subscript(prim.Variable(vector_name), (prim.Variable(vec_iname),))