diff --git a/sdk-api-src/content/xamlom/nf-xamlom-initializexamldiagnosticsex.md b/sdk-api-src/content/xamlom/nf-xamlom-initializexamldiagnosticsex.md
index e3c75ee06ac5..7ef211538001 100644
--- a/sdk-api-src/content/xamlom/nf-xamlom-initializexamldiagnosticsex.md
+++ b/sdk-api-src/content/xamlom/nf-xamlom-initializexamldiagnosticsex.md
@@ -72,7 +72,7 @@ The name of the DLL to be injected in the process.
 
 ### -param tapClsid [in]
 
-The COM CLSID of the DLL to be injected in the process.
+The COM CLSID of an object implementing IObjectWithSite, to be created from the DLL to be injected in the process. The site object will implement IXamlDiagnostics.
 
 ### -param wszInitializationData [in]