diff --git a/doc/development/api/placeholder.rst b/doc/development/api/placeholder.rst
index 860c7b958..2d5366d2b 100644
--- a/doc/development/api/placeholder.rst
+++ b/doc/development/api/placeholder.rst
@@ -1,8 +1,8 @@
 .. highlight:: python
    :linenothreshold: 5
 
-Writing an HTML e-mail placeholder plugin
-=========================================
+Writing an e-mail placeholder plugin
+====================================
 
 An email placeholder is a dynamic value that pretix users can use in their email templates.