diff --git a/source/utilities.tex b/source/utilities.tex
index c62cf5d6e3..19db3d4395 100644
--- a/source/utilities.tex
+++ b/source/utilities.tex
@@ -2730,7 +2730,8 @@
 
 \begin{itemdescr}
 \pnum
-All specializations of \tcode{tuple_size} meet the
+Except where specified otherwise,
+all specializations of \tcode{tuple_size} meet the
 \oldconcept{UnaryTypeTrait} requirements\iref{meta.rqmts} with a
 base characteristic of \tcode{integral_constant<size_t, N>}
 for some \tcode{N}.