diff --git a/Doc/lib/libmailbox.tex b/Doc/lib/libmailbox.tex
index 24765c8d3ea..80ef40c4aad 100644
--- a/Doc/lib/libmailbox.tex
+++ b/Doc/lib/libmailbox.tex
@@ -1203,7 +1203,6 @@ correspond:
 \end{tableii}
 
 \subsection{Exceptions}
-\label{mailbox-deprecated}
 
 The following exception classes are defined in the \module{mailbox} module: