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-rw-r--r--doc/RefMan-ltac.tex4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/RefMan-ltac.tex b/doc/RefMan-ltac.tex
index 73731bea5a..d4408ace7e 100644
--- a/doc/RefMan-ltac.tex
+++ b/doc/RefMan-ltac.tex
@@ -352,9 +352,11 @@ tries to apply $v_2$ and so on. It fails if there is no solving tactic.\\
We have the identity tactic:\\
-{\tt Idtac}\\
+{\tt Idtac} and {\tt Idtac ``message''}\\
It leaves the goal unchanged but it appears in the proof script.
+If there is a string as an argument then it prints this string on the
+standard output.
\subsubsection{Failing}