diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/MouseDevice.cs b/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/MouseDevice.cs
index f2c33ba1816..41a0b72fcea 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/MouseDevice.cs
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/MouseDevice.cs
@@ -1736,7 +1736,7 @@ private void PreNotifyInput(object sender, NotifyInputEventArgs e)
                             actions |= RawMouseActions.QueryCursor;
                         }
 
-                        RawMouseActions[] ButtonPressActions =
+                        ReadOnlySpan<RawMouseActions> ButtonPressActions = stackalloc RawMouseActions[5]
                         {
                             RawMouseActions.Button1Press,
                             RawMouseActions.Button2Press,
@@ -1745,7 +1745,7 @@ private void PreNotifyInput(object sender, NotifyInputEventArgs e)
                             RawMouseActions.Button5Press
                         };
 
-                        RawMouseActions[] ButtonReleaseActions =
+                        ReadOnlySpan<RawMouseActions> ButtonReleaseActions = stackalloc RawMouseActions[5]
                         {
                             RawMouseActions.Button1Release,
                             RawMouseActions.Button2Release,