diff --git a/js/src/xpconnect/src/nsXPConnect.cpp b/js/src/xpconnect/src/nsXPConnect.cpp
index 26c346b2f97f..e4048a9e329a 100644
--- a/js/src/xpconnect/src/nsXPConnect.cpp
+++ b/js/src/xpconnect/src/nsXPConnect.cpp
@@ -889,7 +889,6 @@ nsXPConnect::Traverse(void *p, nsCycleCollectionTraversalCallback &cb)
             "Object",
             "Double",
             "String",
-            "Function",
             "Namespace",
             "Qname",
             "Xml"