diff --git a/theme/src/node/collections/complete.ts b/theme/src/node/collections/complete.ts
index 865aa922..54185b10 100644
--- a/theme/src/node/collections/complete.ts
+++ b/theme/src/node/collections/complete.ts
@@ -30,6 +30,6 @@ function completeCollectionItems(collection: ThemeCollectionItem): void {
     collection.categories && (collection.categoriesLink ||= `${collection.linkPrefix}categories/`)
   }
   else {
-    collection.linkPrefix = normalizePath(`/${collection.dir}/`)
+    collection.linkPrefix ||= normalizePath(`/${collection.dir}/`)
   }
 }