diff --git a/doc/filters/index.rst b/doc/filters/index.rst
index 8daa96118..1ef94199f 100644
--- a/doc/filters/index.rst
+++ b/doc/filters/index.rst
@@ -29,6 +29,7 @@ Filters
     round
     slice
     sort
+    spaceless
     split
     striptags
     title