diff --git a/doc/gperf.texi b/doc/gperf.texi
index 24af8bf..a5d8dc5 100644
--- a/doc/gperf.texi
+++ b/doc/gperf.texi
@@ -25,7 +25,8 @@
 @c Remove the black boxes generated in the GPL appendix.
 @finalout
 
-@c Use a brown colour for interactive links, like it was before commit
+@c In PDF output, use a brown colour for interactive links,
+@c like it was before commit
 @c https://git.savannah.gnu.org/gitweb/?p=texinfo.git;a=commitdiff;h=b4f50b9f4c083327e81ec5c7cde9b87234a19646
 @tex
 \global\def\linkcolor{\rgbDarkRed}