diff --git a/python/dune/perftool/loopy/vcl.py b/python/dune/perftool/loopy/vcl.py
index 83945b915fb03ccc78aa9ab0b21035f112b8d08f..191889c00c9e5a4790a4b4bb9e0a25a1e3f2c16d 100644
--- a/python/dune/perftool/loopy/vcl.py
+++ b/python/dune/perftool/loopy/vcl.py
@@ -87,7 +87,7 @@ class VCLPermute(lp.symbolic.FunctionIdentifier):
         self.permutation = permutation
 
     def __getinitargs__(self):
-        return (self.nptype, self.vector_width,self.permutation)
+        return (self.nptype, self.vector_width, self.permutation)
 
     @property
     def name(self):
@@ -148,4 +148,4 @@ def vcl_store_and_load_mangler(knl, func, arg_dtypes):
         return lp.CallMangleInfo(func.name, (), (lp.types.NumpyType(np.int32),))
 
     if isinstance(func, VCLStore):
-        return lp.CallMangleInfo(func.name, (), (lp.types.NumpyType(np.int32),))
\ No newline at end of file
+        return lp.CallMangleInfo(func.name, (), (lp.types.NumpyType(np.int32),))