diff --git a/lib/mongodb/collection.js b/lib/mongodb/collection.js
index 33394d4811b..210f563beba 100644
--- a/lib/mongodb/collection.js
+++ b/lib/mongodb/collection.js
@@ -1293,7 +1293,7 @@ Collection.prototype.isCapped = function isCapped(callback) {
     if(err != null) {
       callback(err);
     } else {
-      callback(null, document.capped);
+      callback(null, document && document.capped);
     }
   });
 };