metatag.admin.inc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/metatag.admin.inc b/metatag.admin.inc
index 17c5911..183b35e 100644
--- a/metatag.admin.inc
+++ b/metatag.admin.inc
@@ -273,7 +273,9 @@ function metatag_config_edit_form($form, &$form_state, $config) {
   $contexts = explode(':', $config->instance);
   $options['context'] = $contexts[0];
   if ($contexts[0] != 'global') {
-    $options['token types'] = array(token_get_entity_mapping('entity', $contexts[0]));
+    if ($token_type = token_get_entity_mapping('entity', $contexts[0])) {
+      $options['token types'] = array($token_type);
+    }
   }
 
   // Ensure that this configuration is properly compared to its parent 'default'