diff --git a/dpdata/plugins/ase.py b/dpdata/plugins/ase.py
index f1745b472..61bc14dc1 100644
--- a/dpdata/plugins/ase.py
+++ b/dpdata/plugins/ase.py
@@ -46,6 +46,7 @@ def from_system(self, atoms: "ase.Atoms", **kwargs) -> dict:
             'cells': np.array([cells]).astype('float32'),
             'coords': np.array([coords]).astype('float32'),
             'orig': np.zeros(3),
+            'nopbc': not np.any(atoms.get_pbc()),
         }
         return info_dict