diff --git a/src/Avalonia.Animation/Animators/Animator`1.cs b/src/Avalonia.Animation/Animators/Animator`1.cs
index 121ffda564..0660440e30 100644
--- a/src/Avalonia.Animation/Animators/Animator`1.cs
+++ b/src/Avalonia.Animation/Animators/Animator`1.cs
@@ -89,7 +89,7 @@ namespace Avalonia.Animation.Animators
             else
                 newValue = (T)lastKeyframe.Value;
 
-            if (lastKeyframe.KeySpline != null) // TODO: do we use firstKeyFrame or lastKeyframe?!
+            if (lastKeyframe.KeySpline != null)
                 progress = lastKeyframe.KeySpline.GetSplineProgress(progress);
 
             return Interpolate(progress, oldValue, newValue);