diff --git a/server/helpers/custom-validators/webfinger.ts b/server/helpers/custom-validators/webfinger.ts
index c53db4027..1b9aad444 100644
--- a/server/helpers/custom-validators/webfinger.ts
+++ b/server/helpers/custom-validators/webfinger.ts
@@ -11,7 +11,7 @@ function isWebfingerResourceValid (value: string) {
 
   const host = actorParts[1]
 
-  return host === CONFIG.WEBSERVER.HOST
+  return host === CONFIG.WEBSERVER.HOSTNAME || host === CONFIG.WEBSERVER.HOST
 }
 
 // ---------------------------------------------------------------------------