diff --git a/source/compatibility.tex b/source/compatibility.tex
index cc442c3e0f..23ba5e4f8d 100644
--- a/source/compatibility.tex
+++ b/source/compatibility.tex
@@ -3641,7 +3641,6 @@
 by \libheaderref{iso646.h}.
 
 \rSec3[diff.header.stdalign.h]{Header \tcode{<stdalign.h>}}
-\indexhdr{stdalign.h}%
 
 \pnum
 The token \keyword{alignas} is a keyword in \Cpp{}\iref{lex.key},
@@ -3649,7 +3648,6 @@
 by \libheaderref{stdalign.h}.
 
 \rSec3[diff.header.stdbool.h]{Header \tcode{<stdbool.h>}}
-\indexhdr{stdbool.h}%
 
 \pnum
 The tokens \keyword{bool}, \keyword{true}, and \keyword{false}