diff --git a/conservancy_beancount/plugin/meta_expense_allocation.py b/conservancy_beancount/plugin/meta_expense_allocation.py
index 1f09cce60e631d7ca0a13b015b20149427eaee8e..74ede4de04f706003062cf393e6fecd416581377 100644
--- a/conservancy_beancount/plugin/meta_expense_allocation.py
+++ b/conservancy_beancount/plugin/meta_expense_allocation.py
@@ -15,11 +15,14 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 from . import core
+from .._typing import (
+    MetaValueEnum,
+    Posting,
+    Transaction,
+)
 
-class MetaExpenseAllocation(core.PostingChecker):
-    ACCOUNTS = ('Expenses:',)
-    METADATA_KEY = 'expense-allocation'
-    VALUES_ENUM = core.MetadataEnum(METADATA_KEY, {
+class MetaExpenseAllocation(core._NormalizePostingMetadataHook):
+    VALUES_ENUM = core.MetadataEnum('expense-allocation', {
         'administration',
         'fundraising',
         'program',
@@ -32,5 +35,8 @@ class MetaExpenseAllocation(core.PostingChecker):
         'Expenses:Services:Fundraising': VALUES_ENUM['fundraising'],
     }
 
-    def _default_value(self, txn, post):
+    def _run_on_post(self, txn: Transaction, post: Posting) -> bool:
+        return post.account.startswith('Expenses:')
+
+    def _default_value(self, txn: Transaction, post: Posting) -> MetaValueEnum:
         return self.DEFAULT_VALUES.get(post.account, 'program')