diff --git a/packages/minimongo/minimongo.js b/packages/minimongo/minimongo.js
index da65f69631..3a5976b10d 100644
--- a/packages/minimongo/minimongo.js
+++ b/packages/minimongo/minimongo.js
@@ -841,7 +841,7 @@ LocalCollection._idStringify = function (id) {
     }
   } else if (id === undefined) {
     return '-';
-  } else if (typeof id === 'object') {
+  } else if (typeof id === 'object' && id !== null) {
     throw new Error("Meteor does not currently support objects other than ObjectID as ids");
   } else { // Numbers, true, false, null
     return "~" + JSON.stringify(id);