Index: modules/node/node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.967
diff -u -p -r1.967 node.module
--- modules/node/node.module	26 May 2008 17:12:55 -0000	1.967
+++ modules/node/node.module	4 Jul 2008 21:03:03 -0000
@@ -2100,8 +2100,8 @@ function node_access($op, $node, $accoun
     if (count($grants)) {
       $grants_sql = 'AND (' . implode(' OR ', $grants) . ')';
     }
-
-    $sql = "SELECT COUNT(*) FROM {node_access} WHERE (nid = 0 OR nid = %d) $grants_sql AND grant_$op >= 1";
+    $grant_op = db_escape_table('grant_' . $op);
+    $sql = "SELECT COUNT(*) FROM {node_access} WHERE (nid = 0 OR nid = %d) $grants_sql AND $grant_op >= 1";
     $result = db_query($sql, $node->nid);
     return (db_result($result));
   }