diff --git a/source/lib-intro.tex b/source/lib-intro.tex
index 6fe8e8fa0e..858fb6f51c 100644
--- a/source/lib-intro.tex
+++ b/source/lib-intro.tex
@@ -2572,7 +2572,7 @@
 \end{itemdescr}
 
 \begin{itemdecl}
-a.construct(c, args)
+a.construct(c, args...)
 \end{itemdecl}
 
 \begin{itemdescr}