diff --git a/src/storages/hydrate.ts b/src/storages/hydrate.ts
index 15af9e18..7f5c8125 100644
--- a/src/storages/hydrate.ts
+++ b/src/storages/hydrate.ts
@@ -226,7 +226,7 @@ function gatherQuotes({ events, store, signal }: HydrateOpts): Promise<DittoEven
 }
 
 /** Collect authors from the events. */
-function gatherAuthors({ events, store, signal }: HydrateOpts): Promise<DittoEvent[]> {
+async function gatherAuthors({ events, store, signal }: HydrateOpts): Promise<DittoEvent[]> {
   const pubkeys = new Set<string>();
 
   for (const event of events) {