diff --git a/core/interact/interact.py b/core/interact/interact.py
index fdd45f2..1c7a2a4 100644
--- a/core/interact/interact.py
+++ b/core/interact/interact.py
@@ -228,7 +228,7 @@ class InteractBase(object):
         return None
 
     def input(self, s, answer_key):
-        ans = get_default_answer(answer_key)
+        ans = self.get_default_answer(answer_key)
         if ans is not None:
             return ans