diff --git a/src/Markup/Perspex.Markup/Data/ExpressionNode.cs b/src/Markup/Perspex.Markup/Data/ExpressionNode.cs
index ac1cad5b61..b68c1ed426 100644
--- a/src/Markup/Perspex.Markup/Data/ExpressionNode.cs
+++ b/src/Markup/Perspex.Markup/Data/ExpressionNode.cs
@@ -114,7 +114,7 @@ namespace Perspex.Markup.Data
             }
             else
             {
-                Next.SendValidationStatus(status);
+                Next?.SendValidationStatus(status);
             }
         }