diff --git a/parser/parser-asap/parser_asap.py b/parser/parser-asap/parser_asap.py
index 2cde0f94d0dcd8c6df13e01f939f7d65fb997bf3..8f0a99ef15617bda7be8ee5670050d05b7f52f92 100644
--- a/parser/parser-asap/parser_asap.py
+++ b/parser/parser-asap/parser_asap.py
@@ -104,7 +104,6 @@ def parse(filename):
                                      c(f.get_forces(apply_constraint=False),
                                        'eV/angstrom'))
         with o(p, 'section_sampling_method'):
-            ds = t.description
             ensemble_type = 'NVE'  # default ensemble_type
             if ds:  # if there is a traj.description
                 if 'timestep' in ds:  # timestep in MD