diff --git a/lib/repl.js b/lib/repl.js
index d500181736b7ac..75e845c07ce989 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -1360,7 +1360,7 @@ function complete(line, callback) {
     filter = completeOn;
     if (this.allowBlockingCompletions) {
       const subdir = match[2] || '';
-      const extensions = ObjectKeys(this.context.require.extensions);
+      const extensions = ObjectKeys(CJSModule._extensions);
       const indexes = ArrayPrototypeMap(extensions,
                                         (extension) => `index${extension}`);
       ArrayPrototypePush(indexes, 'package.json', 'index');