diff --git a/src/context/document/DocumentLoader.tsx b/src/context/document/DocumentLoader.tsx
index 8b61a1e..1c4b2f2 100644
--- a/src/context/document/DocumentLoader.tsx
+++ b/src/context/document/DocumentLoader.tsx
@@ -36,8 +36,10 @@ export function DocumentLoader({
         relationships: doc.expand?.relationships_via_primary || [],
         relatedDocuments:
           doc.expand?.relationships_via_primary?.flatMap(
-            // Note: If there are no entries in the expanded secondaries there just won't be an entry instead of an empty list.
-            (r: RecordModel) => r.expand?.secondary ?? [],
+            (r: RecordModel): AnyDocument[] =>
+              // Note: If there are no entries in the expanded secondaries there
+              // just won't be an entry instead of an empty list.
+              r.expand?.secondary ?? [],
           ) ?? [],
       });
     }