1 files changed, 6 insertions, 0 deletions
diff --git a/modules/comment/comment.install b/modules/comment/comment.install
index fd227065b..894a070e8 100644
--- a/modules/comment/comment.install
+++ b/modules/comment/comment.install
@@ -261,6 +261,9 @@ function comment_schema() {
       'status' => array('status'),
     ),
     'primary key' => array('cid'),
+    'foreign keys' => array(
+      'nid' => array('node' => 'nid'),
+    ),
   );
 
   $schema['node_comment_statistics'] = array(
@@ -303,6 +306,9 @@ function comment_schema() {
     'indexes' => array(
       'node_comment_timestamp' => array('last_comment_timestamp'),
     ),
+    'foreign keys' => array(
+      'nid' => array('node' => 'nid'),
+    ),
   );
 
   return $schema;