diff --git a/laydi/dataset.py b/laydi/dataset.py
index 00591eb..25f6d34 100644
--- a/laydi/dataset.py
+++ b/laydi/dataset.py
@@ -298,7 +298,8 @@ class Dataset(object):
         
         """
         ds = self.copy()
-        indices = ds.get_indices(dim, idents)
+        indices = array_sort(ds.get_indices(dim, idents))
+        
         idents = ds.get_identifiers(dim, indices=indices)
         if not idents:
             raise ValueError("No of identifers from: \n%s \nfound in %s" %(str(idents), ds._name))