diff --git a/lib/compiler/visitor.js b/lib/compiler/visitor.js
index ec5469b..d3c0859 100644
--- a/lib/compiler/visitor.js
+++ b/lib/compiler/visitor.js
@@ -1,7 +1,5 @@
 "use strict";
 
-let objects = require("../utils/objects");
-
 /* Simple AST node visitor builder. */
 let visitor = {
   build: function(functions) {
@@ -62,7 +60,11 @@ let visitor = {
           any:          visitNop
         };
 
-    objects.defaults(functions, DEFAULT_FUNCTIONS);
+    Object.keys(DEFAULT_FUNCTIONS).forEach(type => {
+      if (!functions.hasOwnProperty(type)) {
+        functions[type] = DEFAULT_FUNCTIONS[type];
+      }
+    });
 
     return visit;
   }