diff --git a/src/msspec/__init__.py b/src/msspec/__init__.py
index 5fa3547..3eb418e 100644
--- a/src/msspec/__init__.py
+++ b/src/msspec/__init__.py
@@ -17,8 +17,8 @@
 # along with this msspec.  If not, see <http://www.gnu.org/licenses/>.
 #
 # Source file  : src/msspec/__init__.py
-# Last modified: Mon, 27 Sep 2021 17:49:48 +0200
-# Committed by : sylvain tricot <sylvain.tricot@univ-rennes1.fr>
+# Last modified: Wed, 18 Jun 2025 13:49:16 +0200
+# Committed by : Sylvain Tricot <sylvain.tricot@univ-rennes.fr>
 
 
 import ase
@@ -38,5 +38,6 @@ def init_msspec():
     ase.atom.names['RA_cut_off'] = ('RA_cuts_off', 1)
     ase.atom.names['atom_type'] = ('atom_types', None)
     ase.atoms.Atoms.absorber = None
+    ase.atoms.Atoms.emitter = property(lambda self: self.absorber, lambda self,i: setattr(self, "absorber", i))
 
 init_msspec()