diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index 76935562d5ce..a069ae7a748e 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -1538,6 +1538,11 @@ 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,
@@ -1548,6 +1553,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
 		goto out1;
 	}
 
+out:
 	*vbn = bit << indx->idx2vbn_bits;
 
 	return 0;