diff --git a/doc/developer/advance.tex b/doc/developer/advance.tex
index 13357f76e11e74b919a909d9d7c617ccaf669c6e..ab2200361f82dd9c2b9e4ffe3e60fab98bf0ecb2 100644
--- a/doc/developer/advance.tex
+++ b/doc/developer/advance.tex
@@ -570,6 +570,12 @@ modify or disable test cases.
 & \textit{None}
 \\
 \hline
+\texttt{ENABLED\_IF}\nscodeidxdef{Test!Directive}{ENABLED\_IF}
+& Conditionally enable subsequent tests, using Dune variables
+  (e.g. \verb|%{bin-available:gcc}|).
+& \texttt{true}
+\\
+\hline
 \texttt{\underline{EXECNOW}}\nscodeidxdef{Test!Directive}{EXECNOW}
 & Run a custom command.
 & \textit{None}