diff --git a/conservancy_beancount/beancount_types.py b/conservancy_beancount/beancount_types.py
index 98db52fe7213ae6109938b73bb90c51471877c48..c82abf59a536b1601ad80ba91537cc3e268c9425 100644
--- a/conservancy_beancount/beancount_types.py
+++ b/conservancy_beancount/beancount_types.py
@@ -49,7 +49,7 @@ class Directive(NamedTuple):
 
 
 class Error(NamedTuple):
-    source: Optional[bc_data.Meta]
+    source: Optional[Mapping[MetaKey, MetaValue]]
     message: str
     entry: Optional[Directive]