diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index 5d16a0d..a6617e3 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -668,7 +668,8 @@
 
 \begin{funcdesc}{chmod}{path, mode}
 Change the mode of \var{path} to the numeric \var{mode}.
-\var{mode} may take one of the following values:
+\var{mode} may take one of the following values
+(as defined in the \module{stat} module):
 \begin{itemize}
   \item \code{S_ISUID}
   \item \code{S_ISGID}