diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index ba71eb5ced56..391c0d28e1bc 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -165,7 +165,7 @@ struct linelock {
        u8 l2linesize;          /* 1: log2 of linesize */
        /* (8) */

-       struct lv lv[20];       /* 40: */
+       struct lv lv[]; /* 40: */
 };                             /* (48) */

 #define dt_lock        linelock