diff --git a/docs/reference/mapping/fields.asciidoc b/docs/reference/mapping/fields.asciidoc
index 669310dedfd..44175cf768d 100644
--- a/docs/reference/mapping/fields.asciidoc
+++ b/docs/reference/mapping/fields.asciidoc
@@ -32,7 +32,7 @@ can be customised when a mapping type is created.
 
     The original JSON representing the body of the document.
 
-{plugins}/mapping-size.html[`_size`]::
+{plugins}/mapper-size.html[`_size`]::
 
     The size of the `_source` field in bytes, provided by the
     {plugins}/mapping-size.html[`mapper-size` plugin].