diff --git a/source/lib-intro.tex b/source/lib-intro.tex
index 99420d7c6d..8fb312f655 100644
--- a/source/lib-intro.tex
+++ b/source/lib-intro.tex
@@ -1132,6 +1132,7 @@
 \pnum
 \ref{contents} describes the entities and macros defined in the \Cpp{} standard library.
 \ref{headers} lists the standard library headers and some constraints on those headers.
+\ref{std.modules} lists the standard library modules and some constraints on those modules.
 \ref{compliance} lists requirements for a freestanding implementation of the \Cpp{}
 standard library.