diff --git a/README.md b/README.md
index bb47b0b..9cc039f 100644
--- a/README.md
+++ b/README.md
@@ -179,8 +179,18 @@ consists of `vendored/normalize-8.0.1.css`. This is it's license:
 ### Material Icons
 
 The **material icons** are, as their name suggests, icons, which are used in place of text. They
-consist of the files `vendored/material-icons.css` and `vendored/material-icons.ttf`. This is their
-license:
+consist of the files `vendored/material-icons.css` and `vendored/material-icons.ttf`.
+
+The former of those has been modified. Originally it was as provided by upstream, except for the
+location of the font file. It has since been modified more. Those changes can easily be viewed via
+[`git log vendored/material-icons.css`][mi-log] and
+[`git blame vendored/material-icons.css`][mi-blame]. A link to a web rendering of both has been
+provided for convenience.
+
+[mi-log]: https://git.tfld.dev/tfld/watterblock/commits/branch/main/vendored/material-icons.css
+[mi-blame]: https://git.tfld.dev/tfld/watterblock/blame/branch/main/vendored/material-icons.css
+
+This is the license:
 
                                      Apache License
                                Version 2.0, January 2004
diff --git a/vendored/material-icons.css b/vendored/material-icons.css
index ea575c5..b185f9c 100644
--- a/vendored/material-icons.css
+++ b/vendored/material-icons.css
@@ -1,3 +1,5 @@
+/* This file has been modified specifically for the watterblock. */
+
 @font-face {
   font-display: swap;
   font-family: 'Material Symbols Outlined';