diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst
index 4a64d530b..c841400b6 100644
--- a/docs/topics/selectors.rst
+++ b/docs/topics/selectors.rst
@@ -1032,11 +1032,6 @@ whereas the CSS lookup is translated into XPath and thus runs more efficiently,
 so performance-wise its uses are limited to situations that are not easily
 described with CSS selectors.
 
-Parsel also simplifies adding your own XPath extensions.
-
-.. autofunction:: parsel.xpathfuncs.set_xpathfunc
-
-
 .. _topics-selectors-ref:
 
 Built-in Selectors reference