diff --git a/solid/core/object_base.py b/solid/core/object_base.py
index 2e6ca4c0..4e7d109a 100644
--- a/solid/core/object_base.py
+++ b/solid/core/object_base.py
@@ -37,13 +37,16 @@ def __call__(self, *args):
     def __repr__(self):
         return self.as_scad()
 
-    def as_scad(self, _fn=None):
+    def as_scad(self, scad_interface=None):
         from .scad_render import scad_render
-        return scad_render(self, _fn=_fn)[:-1]
+        return scad_render(self, scad_interface=scad_interface)[:-1]
 
-    def save_as_scad(self, filename='', outdir='', _fn=None):
+    def save_as_scad(self, filename='', outdir='', scad_interface=None):
         from .scad_render import scad_render_to_file
-        return scad_render_to_file(self, filename, outdir, _fn=_fn)
+        return scad_render_to_file(self,
+                                   filename,
+                                   outdir,
+                                   scad_interface=scad_interface)
 
 class OpenSCADObject(ObjectBase):
     def __init__(self, name, params):
diff --git a/solid/core/scad_render.py b/solid/core/scad_render.py
index f17b1595..6f90d097 100644
--- a/solid/core/scad_render.py
+++ b/solid/core/scad_render.py
@@ -8,7 +8,7 @@
 # =========================================
 # = Rendering Python code to OpenSCAD code=
 # =========================================
-def scad_render(root, file_header = '', _fn=None, scad_interface=None):
+def scad_render(root, file_header = '', scad_interface=None):
     #get a list of all used and included files
     includes = get_include_string()
 
@@ -26,9 +26,6 @@ def scad_render(root, file_header = '', _fn=None, scad_interface=None):
     extensions_footer_str = default_extension_manager.call_post_render(root)
     extensions_footer_str += "\n" if extensions_footer_str else ''
 
-    if _fn:
-        file_header += f'$fn = {_fn};\n\n'
-
     if scad_interface != None:
         file_header += scad_interface.get_header_str()
 
@@ -36,14 +33,14 @@ def scad_render(root, file_header = '', _fn=None, scad_interface=None):
                        + extensions_footer_str
 
 def scad_render_to_file(scad_object, filename=None, out_dir='',
-                        file_header='', include_orig_code=True, _fn=None,
+                        file_header='', include_orig_code=True,
                         scad_interface = None):
 
     if out_dir == None:
         out_dir = ''
     header = f"// Generated by ExpSolidPython\n" + file_header + "\n"
 
-    rendered_string = scad_render(scad_object, header, _fn, scad_interface)
+    rendered_string = scad_render(scad_object, header, scad_interface)
 
     return _write_to_file(rendered_string, filename, out_dir)
 
diff --git a/solid/examples/11-fonts.py b/solid/examples/11-fonts.py
index ee94bdb7..3d5b3f55 100644
--- a/solid/examples/11-fonts.py
+++ b/solid/examples/11-fonts.py
@@ -12,6 +12,5 @@
 scad = ScadInterface()
 scad.register_font("11-font/RichEatin.otf")
 
-t = text(font="Rich Eatin'", text="blablub")
-scad_render_to_file(t, scad_interface=scad)
+text(font="Rich Eatin'", text="blablub").save_as_scad(scad_interface=scad)