diff --git a/Doc/lib/libunix.tex b/Doc/lib/libunix.tex
index 361aa164796..239f4268545 100644
--- a/Doc/lib/libunix.tex
+++ b/Doc/lib/libunix.tex
@@ -39,6 +39,10 @@ some or many variants of it.  Here's an overview:
 \item[posixfile]
 --- A file-like object with support for locking.
 
+\item[resource]
+--- An interface to provide resource usage information on the current
+process.
+
 \item[syslog]
 --- An interface to the \UNIX{} \code{syslog} library routines.
 
diff --git a/Doc/libunix.tex b/Doc/libunix.tex
index 361aa164796..239f4268545 100644
--- a/Doc/libunix.tex
+++ b/Doc/libunix.tex
@@ -39,6 +39,10 @@ some or many variants of it.  Here's an overview:
 \item[posixfile]
 --- A file-like object with support for locking.
 
+\item[resource]
+--- An interface to provide resource usage information on the current
+process.
+
 \item[syslog]
 --- An interface to the \UNIX{} \code{syslog} library routines.