diff --git a/python/dune/perftool/blockstructured/geometry.py b/python/dune/perftool/blockstructured/geometry.py
index dc9e48e1db63bc35ae9a1031aa9fffb33a804d12..f0d1ed6bf78796a150e7a5991217a96cf2c1d318 100644
--- a/python/dune/perftool/blockstructured/geometry.py
+++ b/python/dune/perftool/blockstructured/geometry.py
@@ -335,9 +335,9 @@ def apply_default_to_global_transformation(name, local):
         expr = a_pym * local_pym[0] * local_pym[1] + b_pym * local_pym[0] + c_pym * local_pym[1] + corner_0_pym
     elif dim == 3:
         a_pym, b_pym, c_pym, d_pym, e_pym, f_pym, g_pym = coeffs_pym
-        expr = a_pym * local_pym[0] * local_pym[1] * local_pym[2] + b_pym * local_pym[0] * local_pym[1] + \
-               c_pym * local_pym[0] * local_pym[2] + d_pym * local_pym[1] * local_pym[2] + \
-               e_pym * local_pym[0] + f_pym * local_pym[1] + g_pym * local_pym[2] + corner_0_pym
+        expr = (a_pym * local_pym[0] * local_pym[1] * local_pym[2] + b_pym * local_pym[0] * local_pym[1] +
+                c_pym * local_pym[0] * local_pym[2] + d_pym * local_pym[1] * local_pym[2] +
+                e_pym * local_pym[0] + f_pym * local_pym[1] + g_pym * local_pym[2] + corner_0_pym)
     else:
         raise NotImplementedError
 
@@ -362,8 +362,8 @@ def apply_constant_to_global_transformation(name, local):
 
     # global[d] = lower_left[d] + local[d] * (upper_right[d] - lower_left[d])
     expr = (prim.Subscript(prim.Variable(corners), (0, dim_pym)) +
-            (prim.Subscript(local, (dim_pym,)) * (prim.Subscript(prim.Variable(corners), (2**dim - 1, dim_pym)) -
-                                                prim.Subscript(prim.Variable(corners), (0, dim_pym)))))
+            prim.Subscript(local, (dim_pym,)) * (prim.Subscript(prim.Variable(corners), (2**dim - 1, dim_pym)) -
+                                                 prim.Subscript(prim.Variable(corners), (0, dim_pym))))
     assignee = prim.Subscript(prim.Variable(name), (dim_pym,))
 
     instruction(assignee=assignee, expression=expr,