diff --git a/src/main/java/org/websoso/WSSServer/service/FeedService.java b/src/main/java/org/websoso/WSSServer/service/FeedService.java
index b1f50d29c..3c3a409de 100644
--- a/src/main/java/org/websoso/WSSServer/service/FeedService.java
+++ b/src/main/java/org/websoso/WSSServer/service/FeedService.java
@@ -89,7 +89,7 @@ public void updateFeed(User user, Long feedId, FeedUpdateRequest request) {
         Feed feed = getFeedOrException(feedId);
         feed.validateUserAuthorization(user, UPDATE);
 
-        if (feed.isNovelChanged(request.novelId())) {
+        if (request.novelId() != null && feed.isNovelChanged(request.novelId())) {
             novelService.getNovelOrException(feed.getNovelId());
         }
         feed.updateFeed(request.feedContent(), request.isSpoiler(), request.novelId());