diff --git a/docs/yap.md b/docs/yap.md
index 9110d384b..4bf3bebe8 100644
--- a/docs/yap.md
+++ b/docs/yap.md
@@ -917,7 +917,7 @@ library are originally from the public-domain Edinburgh Prolog library.
 
 + @ref date
 		
-+ @ref debug
++ @ref Print debug messages and test assertions
 		
 + @ref persistence