diff --git a/src/Framework/MSBuildEventSource.cs b/src/Framework/MSBuildEventSource.cs
index e22ec7413a7..623311f93bb 100644
--- a/src/Framework/MSBuildEventSource.cs
+++ b/src/Framework/MSBuildEventSource.cs
@@ -709,13 +709,13 @@ public void OutOfProcNodeShutDownStop(string shutdownReason)
         [Event(97, Keywords = Keywords.All)]
         public void FallbackAssemblyLoadStart(string assemblyName)
         {
-            WriteEvent(97);
+            WriteEvent(97, assemblyName);
         }
 
         [Event(98, Keywords = Keywords.All)]
         public void FallbackAssemblyLoadStop(string assemblyName)
         {
-            WriteEvent(98);
+            WriteEvent(98, assemblyName);
         }
 
         [Event(99, Keywords = Keywords.All)]