diff --git a/MDANSE/Src/MDANSE/Framework/Jobs/TrajectoryFilter.py b/MDANSE/Src/MDANSE/Framework/Jobs/TrajectoryFilter.py
index ce742f1b3..6adbf06f1 100644
--- a/MDANSE/Src/MDANSE/Framework/Jobs/TrajectoryFilter.py
+++ b/MDANSE/Src/MDANSE/Framework/Jobs/TrajectoryFilter.py
@@ -163,8 +163,7 @@ def finalize(self):
         filtered_coords = apply(
             filter,
             trajectories,
-            apply_offsets=filter_attributes.get("attenuation_type", "bandpass")
-            is not "lowpass",
+            apply_offsets=filter_attributes.get("attenuation_type", "bandpass") != "lowpass",
         )
 
         # Create trajectory writer object