diff --git a/osu.Framework.Tests/Bindables/BindableBindingTest.cs b/osu.Framework.Tests/Bindables/BindableBindingTest.cs
index e7ce25fa66..51175c78f0 100644
--- a/osu.Framework.Tests/Bindables/BindableBindingTest.cs
+++ b/osu.Framework.Tests/Bindables/BindableBindingTest.cs
@@ -492,8 +492,8 @@ public void TestEventArgs()
 
             bindable2.BindTo(bindable1);
 
-            ValueChangedEvent<int> event1 = null;
-            ValueChangedEvent<int> event2 = null;
+            ValueChangedEvent<int> event1 = default;
+            ValueChangedEvent<int> event2 = default;
 
             bindable1.BindValueChanged(e => event1 = e);
             bindable2.BindValueChanged(e => event2 = e);
diff --git a/osu.Framework/Audio/AdjustableAudioComponent.cs b/osu.Framework/Audio/AdjustableAudioComponent.cs
index 41b834da01..2ddfdb6415 100644
--- a/osu.Framework/Audio/AdjustableAudioComponent.cs
+++ b/osu.Framework/Audio/AdjustableAudioComponent.cs
@@ -70,7 +70,7 @@ public void RemoveAdjustment(AdjustableProperty type, IBindable<double> adjustBi
 
         private bool invalidationPending;
 
-        internal void InvalidateState(ValueChangedEvent<double>? valueChangedEvent = null)
+        internal void InvalidateState(ValueChangedEvent<double> valueChangedEvent = default)
         {
             if (CanPerformInline)
                 OnStateChanged();
diff --git a/osu.Framework/Bindables/AggregateBindable.cs b/osu.Framework/Bindables/AggregateBindable.cs
index e65a66e95b..8411a9ae5a 100644
--- a/osu.Framework/Bindables/AggregateBindable.cs
+++ b/osu.Framework/Bindables/AggregateBindable.cs
@@ -85,7 +85,7 @@ public void RemoveSource(IBindable<T> bindable)
             return null;
         }
 
-        private void recalculateAggregate(ValueChangedEvent<T> obj = null)
+        private void recalculateAggregate(ValueChangedEvent<T> obj = default)
         {
             T calculated = initialValue;
 
diff --git a/osu.Framework/Bindables/ValueChangedEvent.cs b/osu.Framework/Bindables/ValueChangedEvent.cs
index 9809faf052..9115b05ab2 100644
--- a/osu.Framework/Bindables/ValueChangedEvent.cs
+++ b/osu.Framework/Bindables/ValueChangedEvent.cs
@@ -7,7 +7,7 @@ namespace osu.Framework.Bindables
     /// An event fired when a value changes, providing the old and new value for reference.
     /// </summary>
     /// <typeparam name="T">The type of bindable.</typeparam>
-    public class ValueChangedEvent<T>
+    public readonly struct ValueChangedEvent<T>
     {
         /// <summary>
         /// The old value.