diff --git a/docs/source/index.rst b/docs/source/index.rst
index adaafb59..24cde4e6 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -58,6 +58,7 @@ Part 2: Core plugin documentation
    plugindocs/flatpagesfile
    plugindocs/sampleplugin
    plugindocs/oauth
+   plugindocs/trim_whitespace
 
 
 Part 3: Plugin Writer's Guide