diff --git a/validphys2/src/validphys/config.py b/validphys2/src/validphys/config.py
index 30bd1c02f9..806a85afb8 100644
--- a/validphys2/src/validphys/config.py
+++ b/validphys2/src/validphys/config.py
@@ -322,7 +322,7 @@ def produce_fitunderlyinglaw(self, fit):
         """
         with self.set_context(ns=self._curr_ns.new_child({"fit": fit})):
             _, datacuts = self.parse_from_("fit", "closuretest", write=False)
-        underlyinglaw = self.parse_pdf(datacuts["fakepdf"])
+        underlyinglaw = datacuts["fakepdf"]
         return {"pdf": underlyinglaw}
 
     @element_of("hyperscans")