diff --git a/xml/System.ComponentModel.DataAnnotations/ValidationAttribute.xml b/xml/System.ComponentModel.DataAnnotations/ValidationAttribute.xml
index 334cca6283e..3390681eff4 100644
--- a/xml/System.ComponentModel.DataAnnotations/ValidationAttribute.xml
+++ b/xml/System.ComponentModel.DataAnnotations/ValidationAttribute.xml
@@ -197,13 +197,14 @@ This constructor chooses a very generic validation error message. Developers sub
         <ReturnType>System.String</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>Gets or sets an error message to associate with a validation control if validation fails.</summary>
-        <value>The error message that is associated with the validation control.</value>
+        <summary>Gets or sets an error message format to associate with a validation control if validation fails.</summary>
+        <value>The error message format that is associated with the control to be validated.  The format may contain {0} insert.</value>
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
  This property is the error message that you associate with the validation control. It is used for non-localized error messages.  
+ The `{0}` insert will be filled with the displayed name for the property that has failed validation.  No other inserts are allowed.
   
  ]]></format>
         </remarks>