diff --git a/src/main/java/cc/vastsea/toyou/service/impl/UserPictureServiceImpl.java b/src/main/java/cc/vastsea/toyou/service/impl/UserPictureServiceImpl.java
index 7a8247e..dbec5f1 100644
--- a/src/main/java/cc/vastsea/toyou/service/impl/UserPictureServiceImpl.java
+++ b/src/main/java/cc/vastsea/toyou/service/impl/UserPictureServiceImpl.java
@@ -52,7 +52,7 @@ public long getUsedStorage(long uid) {
 			if (!picture.getAvailable()) {
 				continue;
 			}
-			Picture p = pictureMapper.selectById(picture.getId());
+			Picture p = pictureMapper.selectById(picture.getPid());
 			if(p!=null) {
 				usedStorage += p.getSize();
 			}