diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba9a2ab..f00b65f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 * Change fonts to IBM Plex
 * Only use local WOFF2 font files
 * Add game overview page (https://git.kucharczyk.xyz/lukas/timetracker/issues/8)
+* Fix session being wrongly considered in progress if it had a certain amount of manual hours (https://git.kucharczyk.xyz/lukas/timetracker/issues/58)
 
 ## 1.0.3 / 2023-02-20 17:16+01:00
 
diff --git a/games/views.py b/games/views.py
index 4c111ac..f422b3b 100644
--- a/games/views.py
+++ b/games/views.py
@@ -192,7 +192,9 @@ def list_sessions(
         dataset = Session.objects.all().order_by("-timestamp_start")
 
     for session in dataset:
-        if session.timestamp_end == None and session.duration_manual.seconds == 0:
+        if session.timestamp_end == None and session.duration_manual == timedelta(
+            seconds=0
+        ):
             session.timestamp_end = datetime.now(ZoneInfo(settings.TIME_ZONE))
             session.unfinished = True