diff --git a/forest/jasmine/traj2stats.py b/forest/jasmine/traj2stats.py
index 6ffaf2e1..782c10a3 100644
--- a/forest/jasmine/traj2stats.py
+++ b/forest/jasmine/traj2stats.py
@@ -1821,6 +1821,6 @@ def gps_stats_generate_summary(
     if parameters.save_osm_log:
         with open(
             f"{logs_folder}/locations_logs_{frequency.name.lower()}.json",
-            "wa",
+            "a",
         ) as loc:
             json.dump(logs, loc, indent=4)