diff --git a/src/mindtouch.dream/dream/XUri.cs b/src/mindtouch.dream/dream/XUri.cs
index cdb3877..924d8eb 100644
--- a/src/mindtouch.dream/dream/XUri.cs
+++ b/src/mindtouch.dream/dream/XUri.cs
@@ -976,6 +976,12 @@ public sealed class XUri : ISerializable {
         /// <param name="uri">Input uri.</param>
         public XUri(Uri uri) : this(uri.OriginalString) { }
 
+        /// <summary>
+        /// Create a new XUri from an existing XUri
+        /// </summary>
+        /// <param name="uri">Input uri.</param>
+        public XUri(XUri uri) : this(uri.Scheme, uri.User, uri.Password, uri.Host, uri.Port, uri.UsesDefaultPort, uri.Segments, uri.TrailingSlash, uri.Params, uri.Fragment, uri.UsesSegmentDoubleEncoding) { }
+
         /// <summary>
         /// Create a new XUri from serialized form.
         /// </summary>
diff --git a/src/tests/DreamMisc/XUri-Test.cs b/src/tests/DreamMisc/XUri-Test.cs
index 2f56cbc..c3619d5 100644
--- a/src/tests/DreamMisc/XUri-Test.cs
+++ b/src/tests/DreamMisc/XUri-Test.cs
@@ -531,6 +531,23 @@ public class XUriTest {
             }
         }
 
+        [Test]
+        public void TestXUriFromUriConstruction2() {
+            string[] evilSegments = new string[] {
+
+                // Escaped version of "Iñtërnâtiônàlizætiøn" (should look similar to "Internationalization" but with extended characteres)
+                "I\u00f1t\u00ebrn\u00e2ti\u00f4n\u00e0liz\u00e6ti\u00f8n",
+                "A%4b"
+            };
+            foreach(string evil in evilSegments) {
+                XUri original = new XUri("http://" + evil);
+                XUri fromDecoded = new XUri(original.ToString());
+                XUri uri1 = new XUri(original);
+                XUri uri2 = new XUri(fromDecoded);
+                // just making sure they actually parse
+            }
+        }
+
         [Test]
         public void Decode_extended_chars1() {
             const string before = "F\u00F4\u00F6";