diff --git a/fooder/domain/product.py b/fooder/domain/product.py
index c3b99eb..1ad7aa3 100644
--- a/fooder/domain/product.py
+++ b/fooder/domain/product.py
@@ -129,7 +129,8 @@ class Product(Base, CommonMixin):
                 )
             )
             .values(
-                usage_count_cached=select(func.count(Entry.id)).where(
+                usage_count_cached=cls.usage_count_cached
+                + select(func.count(Entry.id)).where(
                     Entry.product_id == cls.id,
                     Entry.processed == False,
                 )