diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 256c3e0f61..fd0b24433f 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -11,7 +11,7 @@ from django.db.models.deletion import CASCADE
 from django.utils.encoding import smart_text
 from django.utils import six
 from django.utils.deprecation import RenameMethodsBase
-from django.utils.translation import ugettext_lazy as _, string_concat
+from django.utils.translation import ugettext_lazy as _
 from django.utils.functional import curry, cached_property
 from django.core import exceptions
 from django import forms
@@ -1348,9 +1348,6 @@ class ManyToManyField(RelatedField):
 
         super(ManyToManyField, self).__init__(**kwargs)
 
-        msg = _('Hold down "Control", or "Command" on a Mac, to select more than one.')
-        self.help_text = string_concat(self.help_text, ' ', msg)
-
     def _get_path_info(self, direct=False):
         """
         Called by both direct an indirect m2m traversal.
diff --git a/django/forms/models.py b/django/forms/models.py
index 93c8b89efe..68c1341cf7 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -18,7 +18,7 @@ from django.utils.encoding import smart_text, force_text
 from django.utils.datastructures import SortedDict
 from django.utils import six
 from django.utils.text import get_text_list, capfirst
-from django.utils.translation import ugettext_lazy as _, ugettext
+from django.utils.translation import ugettext_lazy as _, ugettext, string_concat
 
 
 __all__ = (
@@ -1104,6 +1104,9 @@ class ModelMultipleChoiceField(ModelChoiceField):
         super(ModelMultipleChoiceField, self).__init__(queryset, None,
             cache_choices, required, widget, label, initial, help_text,
             *args, **kwargs)
+        if isinstance(self.widget, SelectMultiple):
+            msg = _('Hold down "Control", or "Command" on a Mac, to select more than one.')
+            self.help_text = string_concat(self.help_text, ' ', msg) if self.help_text else msg
 
     def clean(self, value):
         if self.required and not value:
diff --git a/docs/internals/deprecation.txt b/docs/internals/deprecation.txt
index 095b6d0a33..5fa7ea16ac 100644
--- a/docs/internals/deprecation.txt
+++ b/docs/internals/deprecation.txt
@@ -392,6 +392,11 @@ these changes.
 
 * The ``CACHE_MIDDLEWARE_ANONYMOUS_ONLY`` setting will be removed.
 
+* Usage of the hard-coded *Hold down "Control", or "Command" on a Mac, to select
+  more than one.* string to override or append to user-provided ``help_text`` in
+  forms for ManyToMany model fields will not be performed by Django anymore
+  either at the model or forms layer.
+
 2.0
 ---
 
diff --git a/docs/releases/1.6.txt b/docs/releases/1.6.txt
index 9950717420..a417e81f62 100644
--- a/docs/releases/1.6.txt
+++ b/docs/releases/1.6.txt
@@ -481,6 +481,44 @@ parameters. For example::
 
 ``SQLite`` users need to check and update such queries.
 
+.. _m2m-help_text:
+
+Help text of model form fields for ManyToManyField fields
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+HTML rendering of model form fields corresponding to
+:class:`~django.db.models.ManyToManyField` ORM model fields used to get the
+hard-coded sentence
+
+  *Hold down "Control", or "Command" on a Mac, to select more than one.*
+
+(or its translation to the active locale) imposed as the help legend shown along
+them if neither :attr:`model <django.db.models.Field.help_text>` nor :attr:`form
+<django.forms.Field.help_text>` ``help_text`` attribute was specified by the
+user (or appended to, if ``help_text`` was provided.)
+
+This happened always, possibly even with form fields implementing user
+interactions that don't involve a keyboard and/or a mouse and was handled at the
+model field layer.
+
+Starting with Django 1.6 this doesn't happen anymore.
+
+The change can affect you in a backward incompatible way if you employ custom
+model form fields and/or widgets for ``ManyToManyField`` model fields whose UIs
+do rely on the automatic provision of the mentioned hard-coded sentence. These
+form field implementations need to adapt to the new scenario by providing their
+own handling of the ``help_text`` attribute.
+
+Applications that use Django :doc:`model form </topics/forms/modelforms>`
+facilities together with Django built-in form :doc:`fields </ref/forms/fields>`
+and :doc:`widgets </ref/forms/widgets>` aren't affected but need to be aware of
+what's described in :ref:`m2m-help_text-deprecation` below.
+
+This is because, as an temporary backward-compatible provision, the described
+non-standard behavior has been preserved but moved to the model form field layer
+and occurs only when the associated widget is
+:class:`~django.forms.SelectMultiple` or a subclass.
+
 Miscellaneous
 ~~~~~~~~~~~~~
 
@@ -707,3 +745,16 @@ you can set set the ``form_class`` attribute to a ``ModelForm`` that explicitly
 defines the fields to be used. Defining an ``UpdateView`` or ``CreateView``
 subclass to be used with a model but without an explicit list of fields is
 deprecated.
+
+.. _m2m-help_text-deprecation:
+
+Munging of help text of model form fields for ManyToManyField fields
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+All special handling of the ``help_text`` attibute of ManyToManyField model
+fields performed by standard model or model form fields as described in
+:ref:`m2m-help_text` above is deprecated and will be removed in Django 1.8.
+
+Help text of these fields will need to be handled either by applications, custom
+form fields or widgets, just like happens with the rest of the model field
+types.