diff --git a/23-049/sections/04-terms_and_definitions.adoc b/23-049/sections/04-terms_and_definitions.adoc
index c21fbfa..7f5eeef 100644
--- a/23-049/sections/04-terms_and_definitions.adoc
+++ b/23-049/sections/04-terms_and_definitions.adoc
@@ -1,4 +1,4 @@
-
+[heading="terms, definitions and abbreviated terms"]
 == Terms, definitions and abbreviated terms
 
 === Terms and definitions