diff --git a/ckanext/googleanalytics/plugin.py b/ckanext/googleanalytics/plugin.py
index 74fadb4..c6c83c8 100644
--- a/ckanext/googleanalytics/plugin.py
+++ b/ckanext/googleanalytics/plugin.py
@@ -69,11 +69,11 @@ class GoogleAnalyticsPlugin(p.SingletonPlugin):
             'googleanalytics.fields', '{}'))
 
         googleanalytics_linked_domains = config.get(
-            'googleanalytics.linked_domains', None
+            'googleanalytics.linked_domains', ''
         )
         self.googleanalytics_linked_domains = [
-            x.strip() for x in googleanalytics_linked_domains.split(',')
-        ] if googleanalytics_linked_domains else None
+            x.strip() for x in googleanalytics_linked_domains.split(',') if x
+        ]
 
         if self.googleanalytics_linked_domains:
             self.googleanalytics_fields['allowLinker'] = 'true'