diff --git a/source/containers.tex b/source/containers.tex
index acb51cc8a8..270734fce7 100644
--- a/source/containers.tex
+++ b/source/containers.tex
@@ -5405,7 +5405,7 @@
 Nothing unless an exception is thrown by
 \tcode{*i == *(i-1)}
 or
-\tcode{pred(*i, *(i - 1))}
+\tcode{pred(*i, *(i - 1))}.
 
 \pnum
 \complexity