diff --git a/setup.cfg b/setup.cfg
index 6faef2e65abe138f9ab22c94452c43be0e52c075..77f81d3bfbff0b437d7d65c0bcda8064887aa084 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,3 @@
 [flake8]
-ignore = E126,E127,E128,E123,E226,E241,E242,E265
+ignore = E126,E127,E128,E123,E226,E241,E242,E265,E402,W503
 max-line-length=85
diff --git a/sumpy/codegen.py b/sumpy/codegen.py
index 279f8cb524aeb8762434cf966581e02ad8fa105a..3e5e865e5c3a9c049381fd6653d57f38f7e7c83a 100644
--- a/sumpy/codegen.py
+++ b/sumpy/codegen.py
@@ -148,7 +148,7 @@ bessel_j_two_result_dtype = cl.tools.get_or_register_dtype("bessel_j_two_result"
         )
 
 
-def bessel_mangler(target, identifier, arg_dtypes):
+def bessel_mangler(kernel, identifier, arg_dtypes):
     """A function "mangler" to make Bessel functions
     digestible for :mod:`loopy`.
 
@@ -156,7 +156,7 @@ def bessel_mangler(target, identifier, arg_dtypes):
     """
 
     from loopy.target.pyopencl import PyOpenCLTarget
-    if not isinstance(target, PyOpenCLTarget):
+    if not isinstance(kernel.target, PyOpenCLTarget):
         raise NotImplementedError("Only the PyOpenCLTarget is supported as of now")
 
     if identifier == "hank1_01":