diff --git a/docs/fsharp/language-reference/xml-documentation.md b/docs/fsharp/language-reference/xml-documentation.md
index f9a0587581435..1dbf384215a13 100644
--- a/docs/fsharp/language-reference/xml-documentation.md
+++ b/docs/fsharp/language-reference/xml-documentation.md
@@ -16,6 +16,12 @@ like [fsdocs](http://fsprojects.github.io/FSharp.Formatting/) to generate API re
By default, XML documentation comments are ignored by the compiler. To change this, set `--warnon:3390`. The compiler will then verify the syntax of the XML and the parameters referred to in `` and `` tags.
+You can enable this warning in your project file by adding a `` element to a `` section:
+
+```xml
+3390
+```
+
You can generate the XML file at compile time by doing one of the following:
- You can add a `GenerateDocumentationFile` element to the `` section of your `.fsproj` project file,
@@ -49,7 +55,7 @@ The following example shows the alternative method, without XML tags. In this ex
## Comments with XML tags
If a comment body begins with `<` (normally ``), then it is treated as an XML formatted comment
-body using XML tags. This second way enables you to specify separate notes
+body using XML tags. This second approach enables you to specify separate notes
for a short summary, additional remarks, documentation for each parameter and type parameter and exceptions thrown, and a description of the return value.
The following is a typical XML documentation comment in a signature file: