diff --git a/ReleaseNotes.adoc b/ReleaseNotes.adoc
index 392c1ccc5..62c1f5f4c 100644
--- a/ReleaseNotes.adoc
+++ b/ReleaseNotes.adoc
@@ -21,6 +21,7 @@ https://weechat.org/files/changelog/ChangeLog-devel.html[ChangeLog]
 == Version 1.6 (under dev)
 
 [[v1.6_api_printf]]
+=== Printf API functions
 
 Some "printf" functions have been removed from C API (there were not in scripting API):