diff --git a/source/future.tex b/source/future.tex
index 38948be5d0..96be65a3d0 100644
--- a/source/future.tex
+++ b/source/future.tex
@@ -812,6 +812,9 @@
 
 \pnum
 The header \libheaderref{ctime} has the following additions:
+
+\indexlibraryglobal{asctime}%
+\indexlibraryglobal{ctime}%
 \begin{codeblock}
 char* asctime(const tm* timeptr);
 char* ctime(const time_t* timer);