diff --git a/source/compatibility.tex b/source/compatibility.tex
index 5fef3ab298..70716c9d45 100644
--- a/source/compatibility.tex
+++ b/source/compatibility.tex
@@ -202,10 +202,12 @@
 \libheaderrefx{flat_map}{flat.map.syn},
 \libheaderrefx{flat_set}{flat.set.syn},
 \libheaderref{generator},
+\libheaderref{mdspan},
 \libheaderref{print},
 \libheaderref{spanstream},
-\libheaderref{stacktrace}, and
-\libheaderref{stdatomic.h}.
+\libheaderref{stacktrace},
+\libheaderref{stdatomic.h}, and
+\libheaderref{stdfloat}.
 Valid \CppXX{} code that \tcode{\#include}{s} headers with these names may be
 invalid in this revision of \Cpp{}.