diff --git a/coursebuilder/models/models.py b/coursebuilder/models/models.py
index 8ff4f5ee..c515c297 100644
--- a/coursebuilder/models/models.py
+++ b/coursebuilder/models/models.py
@@ -172,7 +172,7 @@ def clear_readonly_cache(cls):
         cls._IS_READONLY = False
         cls._READONLY_REENTRY_COUNT = 0
         if cls._READONLY_APP_CONTEXT and (
-            cls._READONLY_APP_CONTEXT.fs.is_in_readonly):
+            cls._READONLY_APP_CONTEXT.fs.is_readonly):
             cls._READONLY_APP_CONTEXT.fs.end_readonly()
         cls._READONLY_APP_CONTEXT = None