diff --git a/pystencils/boundaries/createindexlist.py b/pystencils/boundaries/createindexlist.py
index afa2d5a9f1e1a869802cdd473fb4764d7d74bc4f..8619a31d6646ea7b5ce97500f0478388c0e2bcca 100644
--- a/pystencils/boundaries/createindexlist.py
+++ b/pystencils/boundaries/createindexlist.py
@@ -46,8 +46,8 @@ def _create_index_list_python(flag_field_arr, boundary_mask,
         nr_of_ghost_layers = 0
 
     coordinate_names = boundary_index_array_coordinate_names[:len(flag_field_arr.shape)]
-    index_arr_dtype = np.dtype([(name, default_index_array_dtype) for name in coordinate_names] +
-                               [(direction_member_name, default_index_array_dtype)])
+    index_arr_dtype = np.dtype([(name, default_index_array_dtype) for name in coordinate_names]
+                               + [(direction_member_name, default_index_array_dtype)])
 
     # boundary cells are extracted via np.where. To ensure continous memory access in the compute kernel these cells
     # have to be sorted.
@@ -119,8 +119,8 @@ def create_boundary_index_list(flag_field, stencil, boundary_mask, fluid_mask,
     """
     dim = len(flag_field.shape)
     coordinate_names = boundary_index_array_coordinate_names[:dim]
-    index_arr_dtype = np.dtype([(name, default_index_array_dtype) for name in coordinate_names] +
-                               [(direction_member_name, default_index_array_dtype)])
+    index_arr_dtype = np.dtype([(name, default_index_array_dtype) for name in coordinate_names]
+                               + [(direction_member_name, default_index_array_dtype)])
 
     stencil = np.array(stencil, dtype=default_index_array_dtype)
     args = (flag_field, nr_of_ghost_layers, boundary_mask, fluid_mask, stencil, single_link)
diff --git a/pystencils/cpu/kernelcreation.py b/pystencils/cpu/kernelcreation.py
index 746e7b1918b16cb7e70b6309efadb646a51e4ca9..4cf0955a5af86a5e0ccb65ed96d85f6e171006b8 100644
--- a/pystencils/cpu/kernelcreation.py
+++ b/pystencils/cpu/kernelcreation.py
@@ -1,7 +1,6 @@
 from typing import Union
 
 import sympy as sp
-import numpy as np
 
 import pystencils.astnodes as ast
 from pystencils.simp.assignment_collection import AssignmentCollection
@@ -9,7 +8,7 @@ from pystencils.config import CreateKernelConfig
 from pystencils.enums import Target, Backend
 from pystencils.astnodes import Block, KernelFunction, LoopOverCoordinate, SympyAssignment
 from pystencils.cpu.cpujit import make_python_function
-from pystencils.typing import StructType, TypedSymbol, create_type, get_type_of_expression
+from pystencils.typing import StructType, TypedSymbol, create_type
 from pystencils.typing.transformations import add_types
 from pystencils.field import Field, FieldType
 from pystencils.node_collection import NodeCollection