diff --git a/lib/hooks/fc-cache.js b/lib/hooks/fc-cache.js
--- a/lib/hooks/fc-cache.js
+++ b/lib/hooks/fc-cache.js
@@ -32,7 +32,7 @@
         if (farcasterUsername) {
           cachedResult = farcasterUsername;
         } else if (fid && fcCache) {
-          cachedResult = fcCache.getCachedFarcasterUserForFID(fid);
+          cachedResult = fcCache.getCachedFarcasterUserForFID(fid)?.username;
         }
         return {
           input: user,