diff --git a/ICHOR.py b/ICHOR.py
index c09a1d45..c6d8663a 100644
--- a/ICHOR.py
+++ b/ICHOR.py
@@ -896,7 +896,7 @@ def init(self):
     def set(self, name, value):
         name = name.upper()
         if name not in self.global_variables:
-            _unknown_settings.append(name)
+            ProblemFinder.unknown_settings.append(name)
         else:
             setattr(self, name, value)