diff --git a/src/EventTraceKit.EventTracing/EventManifestXmlExtensions.cs b/src/EventTraceKit.EventTracing/EventManifestXmlExtensions.cs
index 0e5073e..9871783 100644
--- a/src/EventTraceKit.EventTracing/EventManifestXmlExtensions.cs
+++ b/src/EventTraceKit.EventTracing/EventManifestXmlExtensions.cs
@@ -292,6 +292,8 @@ public static XElement ToXml(this DataProperty property)
                 elem.Add(new XAttribute("length", property.Length));
             if (property.Count.IsSpecified)
                 elem.Add(new XAttribute("count", property.Count));
+            if (property.Map != null)
+                elem.Add(new XAttribute("map", property.Map.Name));
             return elem;
         }