diff --git a/xml/System/Uri.xml b/xml/System/Uri.xml
index b2e3491d474..55012c8849f 100644
--- a/xml/System/Uri.xml
+++ b/xml/System/Uri.xml
@@ -233,6 +233,7 @@ Uri baseUri = new Uri(@"\\host\share\some\directory\name\");
   
  ]]></format>
     </remarks>
+    <threadsafe>All members of <see cref="T:System.Uri" /> are thread-safe and may be used concurrently from multiple threads.</threadsafe>
     <altmember cref="T:System.Configuration.IdnElement" />
     <altmember cref="T:System.Configuration.IriParsingElement" />
     <altmember cref="T:System.Configuration.UriSection" />