diff --git a/README-docs.md b/README-docs.md
index d394e4570..1cc5972eb 100644
--- a/README-docs.md
+++ b/README-docs.md
@@ -40,6 +40,7 @@
 
 ## Notes
 
+* Miller documents use the Oxford comma: not _red, yellow and green_, but rather _red, yellow, and green_.
 * CSS:
   * I used the Mkdocs "material" theme which I like a lot. I customized `docs/src/extra.css` for Miller coloring/branding.
 * Live code:
diff --git a/docs/src/build.md b/docs/src/build.md
index 5fec6b75c..6752214b8 100644
--- a/docs/src/build.md
+++ b/docs/src/build.md
@@ -125,4 +125,4 @@ git push -u origin miller-6.1.0
 
 ## Misc. development notes
 
-I use terminal width 120 and tabwidth 4.
+I use terminal width 120 and tabwidth 4. Miller documents use the Oxford comma: not _red, yellow and green_, but rather _red, yellow, and green_.
diff --git a/docs/src/build.md.in b/docs/src/build.md.in
index ad2389fe4..395c1211d 100644
--- a/docs/src/build.md.in
+++ b/docs/src/build.md.in
@@ -109,4 +109,4 @@ GENMD-EOF
 
 ## Misc. development notes
 
-I use terminal width 120 and tabwidth 4.
+I use terminal width 120 and tabwidth 4. Miller documents use the Oxford comma: not _red, yellow and green_, but rather _red, yellow, and green_.