diff --git a/source/basic.tex b/source/basic.tex
index e9ce2c1e8e..de215a04d4 100644
--- a/source/basic.tex
+++ b/source/basic.tex
@@ -6252,7 +6252,7 @@
 \tcode{\keyword{long} \keyword{double}},
 \keyword{double}, and
 \tcode{std::float64_t}
-have the same set of values (see \IsoC H.4.3).
+have the same set of values (see \IsoC{} H.4.3).
 \end{tailnote}
 \end{itemize}
 \begin{note}