diff --git a/src/Avalonia.Controls/Diagnostics/ToolTipDiagnostics.cs b/src/Avalonia.Controls/Diagnostics/ToolTipDiagnostics.cs
index 4dfe5eb174..4acf2a217f 100644
--- a/src/Avalonia.Controls/Diagnostics/ToolTipDiagnostics.cs
+++ b/src/Avalonia.Controls/Diagnostics/ToolTipDiagnostics.cs
@@ -7,6 +7,9 @@ namespace Avalonia.Controls.Diagnostics
     /// </summary>
     public static class ToolTipDiagnostics
     {
+        /// <summary>
+        /// Provides access to the internal <see cref="ToolTip.ToolTipProperty"/> for use in DevTools.
+        /// </summary>
         public static AvaloniaProperty<ToolTip?> ToolTipProperty = ToolTip.ToolTipProperty;
     }
 }