diff --git a/urls.py b/urls.py
index ebce032..c1917f1 100644
--- a/urls.py
+++ b/urls.py
@@ -122,7 +122,7 @@ actualurlpatterns = patterns('',
     #(r'^survey_scans/(?P<path>.*)$', 'django.views.static.serve', {'document_root': settings.SURVEY_SCANS, 'show_indexes':True}),
     url(r'^survey_scans/$',                        view_surveys.surveyscansfolders, name="surveyscansfolders"), 
     url(r'^survey_scans/(?P<path>[^/]+)/$',        view_surveys.surveyscansfolder,  name="surveyscansfolder"), 
-    url(r'^survey_scans/(?P<path>[^/]+)/(?P<file>[^/]+(?:png|jpg|jpeg))$', 
+    url(r'^survey_scans/(?P<path>[^/]+)/(?P<file>[^/]+(?:png|jpg|pdf|jpeg|PNG|JPG|PDF|JPEG))$', 
                                                    view_surveys.surveyscansingle,   name="surveyscansingle"), 
 
     url(r'^tunneldata/$',                          view_surveys.tunneldata,         name="tunneldata"),