diff --git a/osu.Game.Rulesets.Mania/Replays/ManiaAutoGenerator.cs b/osu.Game.Rulesets.Mania/Replays/ManiaAutoGenerator.cs
index ba4dfc7ab0..77ca7ab6b8 100644
--- a/osu.Game.Rulesets.Mania/Replays/ManiaAutoGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Replays/ManiaAutoGenerator.cs
@@ -94,7 +94,7 @@ namespace osu.Game.Rulesets.Mania.Replays
             bool canDelayKeyUpFully = nextObject == null ||
                                       nextObject.StartTime > endTime + RELEASE_DELAY;
 
-            return endTime + (canDelayKeyUpFully ? RELEASE_DELAY : (nextObject.StartTime - endTime) * 0.9);
+            return endTime + (canDelayKeyUpFully ? RELEASE_DELAY : (nextObject!.StartTime - endTime) * 0.9);
         }
 
         protected override HitObject? GetNextObject(int currentIndex)
diff --git a/osu.Game.Rulesets.Taiko/Replays/TaikoAutoGenerator.cs b/osu.Game.Rulesets.Taiko/Replays/TaikoAutoGenerator.cs
index 5fd281f9fa..44c68e6af1 100644
--- a/osu.Game.Rulesets.Taiko/Replays/TaikoAutoGenerator.cs
+++ b/osu.Game.Rulesets.Taiko/Replays/TaikoAutoGenerator.cs
@@ -117,7 +117,7 @@ namespace osu.Game.Rulesets.Taiko.Replays
                 var nextHitObject = GetNextObject(i); // Get the next object that requires pressing the same button
 
                 bool canDelayKeyUp = nextHitObject == null || nextHitObject.StartTime > endTime + KEY_UP_DELAY;
-                double calculatedDelay = canDelayKeyUp ? KEY_UP_DELAY : (nextHitObject.StartTime - endTime) * 0.9;
+                double calculatedDelay = canDelayKeyUp ? KEY_UP_DELAY : (nextHitObject!.StartTime - endTime) * 0.9;
                 Frames.Add(new TaikoReplayFrame(endTime + calculatedDelay));
 
                 hitButton = !hitButton;