diff --git a/wiki/unix/C.m4 b/wiki/unix/C.m4
index 69eb1d3..6d9de07 100644
--- a/wiki/unix/C.m4
+++ b/wiki/unix/C.m4
@@ -13,7 +13,7 @@ Alpine has _package(`build-base') and Debian has _package(`build-essential').
 For linking to libraries, see _ref(`#pkg-config').
 </P>
 
-_subheader(`Prototypical C (1978)')
+_subheader(`C1978')
 <UL>
 <LI><A HREF="https://archive.org/details/TheCProgrammingLanguageFirstEdition">The C Programming Language, 1st ed.</A> (The Internet Archive)</LI>
 <LI><A HREF="https://www.bell-labs.com/usr/dmr/www/cman.pdf">C Reference Manual</A> (this paper bears striking similarity to and was also written by the author of Appendix A of <I>The C Programming Language, 1st ed.</I> - the chronology of these writings' release is unknown)</LI>
@@ -43,7 +43,7 @@ This was known as "pre-ANSI C" or "K&amp;R C" and dubbed "C78" for the purposes
 </P>
 _subsubheader(`_italic(`8') and _italic(`9') as valid octal digits')
 _bibliography(`
-_bentr(`_ref(`#Unix#V6') - see /usr/source/c/ in the Sixth Edition root tree')
+_bentr(`_ref(`#unix#v6') - see /usr/source/c/ in the Sixth Edition root tree')
 ')
 <PRE>
 main()
diff --git a/wiki/wiki.m4 b/wiki/wiki.m4
index b591c6d..46fd3e2 100644
--- a/wiki/wiki.m4
+++ b/wiki/wiki.m4
@@ -6,7 +6,7 @@ define(`_bibliography_entry', `<LI>$1</LI>')dnl
 define(`_bentr', `_bibliography_entry($1)')dnl
 define(`_cite', `<CITE>$1</CITE>')dnl
 define(`_code', `<CODE>$1</CODE>')dnl
-define(`_header', `<H2 ID="$1">$1</H2>')dnl
+define(`_header', `define(`_CURRENT_HEADER', $1)<H2 ID="_lowercase($1)">$1</H2>')dnl
 define(`_italic', `<I>$1</I>')dnl
 define(`_link', `<A HREF="$2">$1</A>')dnl
 define(`_lowercase', `translit(`$1', _ASCII_UPPER, _ASCII_LOWER)')dnl
@@ -15,7 +15,7 @@ define(`_passage', `<FIGURE>
 <FIGCAPTION>(_cite(`$1'))</FIGCAPTION>
 </FIGURE>')dnl
 define(`_ref', `_link(`$1', `$1')')dnl
-define(`_subheader', `<H3>$1</H3>')dnl
+define(`_subheader', `<H3 ID="_lowercase(_CURRENT_HEADER)#_lowercase($1)">$1</H3>')dnl
 define(`_subsubheader', `<H4>$1</H4>')dnl
 <!DOCTYPE html>
 <HTML LANG="en">
