diff --git a/python/dune/perftool/loopy/vcl.py b/python/dune/perftool/loopy/vcl.py
index 2d8bf6cc7ed9161587b9f7d7442ebd254dcc719b..b50a4226fdc7869b29d357ec89d0caa5cb316865 100644
--- a/python/dune/perftool/loopy/vcl.py
+++ b/python/dune/perftool/loopy/vcl.py
@@ -64,8 +64,5 @@ def get_vcl_type(nptype, register_size=None, vec_size=None):
 @function_mangler
 def vcl_mul_add(knl, func, arg_dtypes):
     if func == "mul_add":
-        # This is not 100% within the loopy philosophy, as we are
-        # passing the vector registers as references and have them
-        # changed. Loopy assumes this function to be read-only.
         vcl = lp.types.NumpyType(get_vcl_type(np.float64, register_size=256))
         return lp.CallMangleInfo("mul_add", (vcl), (vcl, vcl, vcl))