diff --git a/django/forms/extras/widgets.py b/django/forms/extras/widgets.py
index 65d6bf15f5..0a2223bc3f 100644
--- a/django/forms/extras/widgets.py
+++ b/django/forms/extras/widgets.py
@@ -101,7 +101,6 @@ class SelectDateWidget(Widget):
             return '%s_%s' % (id_, first_select)
         else:
             return '%s_month' % id_
-    id_for_label = classmethod(id_for_label)
 
     def value_from_datadict(self, data, files, name):
         y = data.get(self.year_field % name)
diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 49b148eeca..1fbef98deb 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -234,7 +234,6 @@ class Widget(object):
         tags.
         """
         return id_
-    id_for_label = classmethod(id_for_label)
 
 class Input(Widget):
     """
@@ -735,7 +734,6 @@ class RadioSelect(Select):
         if id_:
             id_ += '_0'
         return id_
-    id_for_label = classmethod(id_for_label)
 
 class CheckboxSelectMultiple(SelectMultiple):
     def render(self, name, value, attrs=None, choices=()):
@@ -767,7 +765,6 @@ class CheckboxSelectMultiple(SelectMultiple):
         if id_:
             id_ += '_0'
         return id_
-    id_for_label = classmethod(id_for_label)
 
 class MultiWidget(Widget):
     """
@@ -826,7 +823,6 @@ class MultiWidget(Widget):
         if id_:
             id_ += '_0'
         return id_
-    id_for_label = classmethod(id_for_label)
 
     def value_from_datadict(self, data, files, name):
         return [widget.value_from_datadict(data, files, name + '_%s' % i) for i, widget in enumerate(self.widgets)]