diff --git a/xml/System.ComponentModel.DataAnnotations/UrlAttribute.xml b/xml/System.ComponentModel.DataAnnotations/UrlAttribute.xml
index 6864e254a08..f7eed32a7c6 100644
--- a/xml/System.ComponentModel.DataAnnotations/UrlAttribute.xml
+++ b/xml/System.ComponentModel.DataAnnotations/UrlAttribute.xml
@@ -100,7 +100,9 @@
         <param name="value">The URL to validate.</param>
         <summary>Validates the format of the specified URL.</summary>
         <returns>
-          <see langword="true" /> if the URL format is valid or <see langword="null" />; otherwise, <see langword="false" />.</returns>
+          <see langword="true" /> if the URL is <see langword="null" />
+          or a <see langword="string" /> that begins with "https://", "http://" or "ftp://";
+          otherwise, <see langword="false" />.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>