diff --git a/src/Perspex.Base/Data/ValidationStatus.cs b/src/Perspex.Base/Data/ValidationStatus.cs
index 9effaa8239..df0dede70d 100644
--- a/src/Perspex.Base/Data/ValidationStatus.cs
+++ b/src/Perspex.Base/Data/ValidationStatus.cs
@@ -15,6 +15,9 @@ namespace Perspex.Data
     /// </summary>
     public abstract class ValidationStatus
     {
+        /// <summary>
+        /// True when the data passes validation; otherwise, false.
+        /// </summary>
         public abstract bool IsValid { get; }
     }
 }