diff --git a/apps/rest_api/urls.py b/apps/rest_api/urls.py
index 3265dd7574..34553951a6 100644
--- a/apps/rest_api/urls.py
+++ b/apps/rest_api/urls.py
@@ -12,5 +12,5 @@ urlpatterns = patterns('',
     
     # Version 0 alpha API calls    
     url(r'^v0/document/(?P<pk>[0-9]+)/$', ReadOnlyInstanceModelView.as_view(resource=DocumentResourceSimple), name='documents-simple'),
-    url(r'^v0/document/(?P<pk>[0-9]+)/page/(?P<page_number>[0-9]+)/expensive/is_zoomable/$', IsZoomable.as_view(), name='documents-expensive-is_zoomable'),
+    url(r'^v0/document/(?P<pk>[0-9]+)/version/(?P<version_pk>[0-9]+)/page/(?P<page_number>[0-9]+)/expensive/is_zoomable/$', IsZoomable.as_view(), name='documents-expensive-is_zoomable'),
 )
diff --git a/apps/rest_api/views.py b/apps/rest_api/views.py
index 6a1b5dfc14..d7623e4ffe 100644
--- a/apps/rest_api/views.py
+++ b/apps/rest_api/views.py
@@ -6,7 +6,7 @@ from django.utils.translation import ugettext_lazy as _
 from django.shortcuts import get_object_or_404
 from django.core.urlresolvers import reverse
 
-from documents.models import Document
+from documents.models import Document, DocumentVersion
 from converter.exceptions import UnknownFileFormat, UnkownConvertError
 
 from djangorestframework.views import View, ModelView, ListModelView, InstanceModelView
@@ -45,11 +45,11 @@ class Version_0(View):
 
 
 class IsZoomable(View):
-    def get(self, request, pk, page_number):
+    def get(self, request, pk, page_number, version_pk):
         logger.info('received is_zoomable call from: %s' % (request.META['REMOTE_ADDR']))
-        document = get_object_or_404(Document, pk=pk)
+        document_version = get_object_or_404(DocumentVersion, pk=version_pk)
         try:
-            document.get_image_cache_name(int(page_number))
+            document_version.document.get_image_cache_name(int(page_number), version_pk)
             return {'result': True}
         except (UnknownFileFormat, UnkownConvertError):
             return {'result': False}