diff --git a/django/contrib/gis/admin/widgets.py b/django/contrib/gis/admin/widgets.py
index 07263cbe80a..be26261b54d 100644
--- a/django/contrib/gis/admin/widgets.py
+++ b/django/contrib/gis/admin/widgets.py
@@ -38,9 +38,14 @@ class OpenLayersWidget(Textarea):
         # Constructing the dictionary of the map options.
         self.params['map_options'] = self.map_options()
 
-        # Constructing the JavaScript module name using the ID of
+        # Constructing the JavaScript module name using the name of
         # the GeometryField (passed in via the `attrs` keyword).
-        self.params['module'] = 'geodjango_%s' % self.params['field_name']
+        # Use the 'name' attr for the field name (rather than 'field')
+        self.params['name'] = name
+        # note: we must switch out dashes for underscores since js
+        # functions are created using the module variable
+        js_safe_name = self.params['name'].replace('-','_')
+        self.params['module'] = 'geodjango_%s' % js_safe_name
 
         if value:
             # Transforming the geometry to the projection used on the
diff --git a/django/contrib/gis/templates/gis/admin/openlayers.html b/django/contrib/gis/templates/gis/admin/openlayers.html
index 361cac55b40..0870c655626 100644
--- a/django/contrib/gis/templates/gis/admin/openlayers.html
+++ b/django/contrib/gis/templates/gis/admin/openlayers.html
@@ -32,6 +32,6 @@
 <div id="{{ id }}_map"{% if LANGUAGE_BIDI %} dir="ltr"{% endif %}></div>
 <a href="javascript:{{ module }}.clearFeatures()">Delete all Features</a>
 {% if display_wkt %}<p> WKT debugging window:</p>{% endif %}
-<textarea id="{{ id }}" class="vWKTField required" cols="150" rows="10" name="{{ field_name }}">{{ wkt }}</textarea>
+<textarea id="{{ id }}" class="vWKTField required" cols="150" rows="10" name="{{ name }}">{{ wkt }}</textarea>
 <script type="text/javascript">{% block init_function %}{{ module }}.init();{% endblock %}</script>
 </span>