diff --git a/stonesoup/reader/generic.py b/stonesoup/reader/generic.py
index a4ed0ce73..6e792c0df 100644
--- a/stonesoup/reader/generic.py
+++ b/stonesoup/reader/generic.py
@@ -89,7 +89,7 @@ def groundtruth_paths_gen(self):
                 state = GroundTruthState(
                     np.array([[row[col_name]] for col_name in self.state_vector_fields],
                              dtype=np.float_),
-                    timestamp=self._get_time(row),
+                    timestamp=time,
                     metadata=self._get_metadata(row))
 
                 id_ = row[self.path_id_field]