diff --git a/sleap/info/write_tracking_h5.py b/sleap/info/write_tracking_h5.py
index 6cbefced8..c8e8dba4b 100644
--- a/sleap/info/write_tracking_h5.py
+++ b/sleap/info/write_tracking_h5.py
@@ -348,7 +348,8 @@ def write_csv_file(output_path, data_dict):
             tracks.append(detection)
 
     tracks = pd.DataFrame(tracks)
-    
+    all_frames = globals().get('all_frames', False)
+
     if all_frames:
         tracks = tracks.set_index('frame_idx')
         tracks = tracks.reindex(range(0, len(data_dict['track_occupancy'])),fill_value=np.nan)
@@ -362,7 +363,7 @@ def main(
     labels: Labels,
     output_path: str,
     labels_path: str = None,
-    all_frames: bool = True,
+    all_frames: bool = False,
     video: Video = None,
     csv: bool = False,
 ):