diff --git a/python/dune/perftool/loopy/vcl.py b/python/dune/perftool/loopy/vcl.py
index fb7c51f85db261d39f085ad2e3b08dd48b24c14a..9d044939ac3b7bf45ecff4d78e70ebe2dcdea9ca 100644
--- a/python/dune/perftool/loopy/vcl.py
+++ b/python/dune/perftool/loopy/vcl.py
@@ -102,3 +102,8 @@ def vcl_function_mangler(knl, func, arg_dtypes):
         vcl = lp.types.NumpyType(get_vcl_type(dtype))
         return lp.CallMangleInfo(func, (vcl,), (vcl,))
 
+    if isinstance(func, str) and func.endswith('.load'):
+        return lp.CallMangleInfo(func, (), (lp.types.NumpyType(np.int32),))
+
+    if isinstance(func, str) and func.endswith('.store'):
+        return lp.CallMangleInfo(func, (), (lp.types.NumpyType(np.int32),))