diff --git a/core/data/config.go b/core/data/config.go
index f1bb7070d..7feb29cfd 100644
--- a/core/data/config.go
+++ b/core/data/config.go
@@ -585,5 +585,5 @@ func GetUsernameBlocklist() string {
 
 // SetUsernameBlocklist set the username blocklist as a comma seperated string.
 func SetUsernameBlocklist(usernames string) error {
-	return _datastore.SetString(serverMetadataTagsKey, usernames)
+	return _datastore.SetString(blockedUsernamesKey, usernames)
 }
diff --git a/router/router.go b/router/router.go
index e13052245..e44c08301 100644
--- a/router/router.go
+++ b/router/router.go
@@ -119,6 +119,9 @@ func Start() error {
 	// Disable chat
 	http.HandleFunc("/api/admin/config/chat/disable", middleware.RequireAdminAuth(admin.SetChatDisabled))
 
+	// Set chat usernames that are not allowed
+	http.HandleFunc("/api/admin/config/chat/disallowedusernames", middleware.RequireAdminAuth(admin.SetUsernameBlocklist))
+
 	// Set video codec
 	http.HandleFunc("/api/admin/config/video/codec", middleware.RequireAdminAuth(admin.SetVideoCodec))