diff --git a/components/script/dom/bindings/codegen/Configuration.py b/components/script/dom/bindings/codegen/Configuration.py
index 14a11c139a9b..0fe9bf6c0043 100644
--- a/components/script/dom/bindings/codegen/Configuration.py
+++ b/components/script/dom/bindings/codegen/Configuration.py
@@ -201,20 +201,17 @@ def __init__(self, config, interface, desc):
         # Callback and SpiderMonkey types do not use JS smart pointers, so we should not use the
         # built-in rooting mechanisms for them.
         if spiderMonkeyInterface:
-            self.needsRooting = False
             self.returnType = 'Rc<%s>' % typeName
             self.argumentType = '&%s' % typeName
             self.nativeType = typeName
             pathDefault = 'dom::types::%s' % typeName
         elif self.interface.isCallback():
-            self.needsRooting = False
             ty = 'dom::bindings::codegen::Bindings::%sBinding::%s' % (ifaceName, ifaceName)
             pathDefault = ty
             self.returnType = "Rc<%s>" % ty
             self.argumentType = "???"
             self.nativeType = ty
         else:
-            self.needsRooting = True
             self.returnType = "Root<%s>" % typeName
             self.argumentType = "&%s" % typeName
             self.nativeType = "*const %s" % typeName