diff --git a/doc/developer/advance.tex b/doc/developer/advance.tex
index 3917f576cf2a906a48c419899453a9d80f77f535..d69576d0ef2875d265d22318d27f0e216022a4ab 100644
--- a/doc/developer/advance.tex
+++ b/doc/developer/advance.tex
@@ -1180,7 +1180,7 @@ or
   \begin{code}
     FILTER: diff --new-file @PTEST_DIR@/oracle_configuration/@PTEST_ORACLE@
   \end{code}
-  Chaining multiple filter commands is possible in defining several \texttt{FILTER} directives,
+  Chaining multiple filter commands is possible in defining several \texttt{FILTER} directives (they are applied in the reverse order),
   and an empty command drops the previous \texttt{FILTER} directives.
 \end{itemize}