diff --git a/pycqed/analysis/analysis_toolbox.py b/pycqed/analysis/analysis_toolbox.py
index f3a4d3ec0b..115557b1ca 100644
--- a/pycqed/analysis/analysis_toolbox.py
+++ b/pycqed/analysis/analysis_toolbox.py
@@ -737,7 +737,7 @@ def get_timestamps_in_range(timestamp_start, timestamp_end=None,
         timestamps.reverse()
         all_timestamps += timestamps
     # Ensures the order of the timestamps is ascending
-    all_timestamps.reverse()
+    all_timestamps.sort()
     return all_timestamps