diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index daabaad63aaf64ae65b8d67bbd40de837bfe3486..14284f0ed46aaa2dc5ce1d3c425e8eeaf08cb32c 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -1533,6 +1533,11 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
 		goto out1;
 	}
 
+	if (data_size <= le64_to_cpu(alloc->nres.data_size)) {
+		/* Reuse index. */
+		goto out;
+	}
+
 	/* Increase allocation. */
 	err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len,
 			    &indx->alloc_run, data_size, &data_size, true,
@@ -1546,6 +1551,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
 	if (in->name == I30_NAME)
 		i_size_write(&ni->vfs_inode, data_size);
 
+out:
 	*vbn = bit << indx->idx2vbn_bits;
 
 	return 0;