diff --git a/src/pystencils_autodiff/framework_integration/astnodes.py b/src/pystencils_autodiff/framework_integration/astnodes.py
index 05ebb09a195647b9e8720e9b0698c8be901f8655..99064e658f951a6bcd9aa7987bcbc31257faec27 100644
--- a/src/pystencils_autodiff/framework_integration/astnodes.py
+++ b/src/pystencils_autodiff/framework_integration/astnodes.py
@@ -253,7 +253,10 @@ class JinjaCppFile(Node):
         assert self.TEMPLATE, f"Template of {self.__class__} must be set"
         render_dict = {k: (self._print(v) if not isinstance(v, (pystencils.Field, pystencils.TypedSymbol)) else v)
                        if not isinstance(v, Iterable) or isinstance(v, str)
-                       else [(self._print(a) if not isinstance(a, (pystencils.Field, pystencils.TypedSymbol)) else a) for a in v]
+                       else [(self._print(a)
+                              if not isinstance(a, (pystencils.Field, pystencils.TypedSymbol))
+                              else a)
+                             for a in v]
                        for k, v in self.ast_dict.items()}
         render_dict.update({"headers": pystencils.backends.cbackend.get_headers(self)})
         render_dict.update({"globals": pystencils.backends.cbackend.get_global_declarations(self)})