diff --git a/unicodedomino.sty b/unicodedomino.sty
index d9aa05ef8b6daf190ff72bdd9d1449be0d885542..ca75a92769d8f1b83072e0500534d32d676cc758 100644
--- a/unicodedomino.sty
+++ b/unicodedomino.sty
@@ -98,6 +98,7 @@
     \expandafter\@gobblefour\string#1%
    \fi%
   \else%
+%: https://github.com/latex3/latex2e/pull/62
    \PackageError{inputenc}{Invalid UTF-8 byte sequence:%
     \expandafter\UTFviii@splitseq\string#1\relax}%
     \UTFviii@invalid@help
diff --git a/unicodedomino_kernel_cosmetics.def b/unicodedomino_kernel_cosmetics.def
index d84f9a2f6a0aa9b2e6a766f056841db05ee0a960..1f95f1714ed3bdeee88e91102b3808af448270d4 100644
--- a/unicodedomino_kernel_cosmetics.def
+++ b/unicodedomino_kernel_cosmetics.def
@@ -30,6 +30,7 @@
  }%
 \fi%
 
+%: https://github.com/latex3/latex2e/pull/63
 % format a number as Unicode codepoint hex
 \ifx\UTFviii@hexcodepoint\@undefined%
  \def\UTFviii@hexcodepoint#1{%
@@ -44,6 +45,7 @@
  }%
 \fi%
 
+%: https://github.com/latex3/latex2e/pull/62
 % split an invalid byte sequence for output
 \ifx\UTFviii@splitseq\@undefined%
  \gdef\UTFviii@splitseq#1:#2\relax{%
@@ -57,12 +59,14 @@
  }%
 \fi%
 
+%: https://github.com/latex3/latex2e/pull/61
 % override message to give the byte in hex
 \def\UTFviii@invalid@err#1{%
  \PackageError{inputenc}{Invalid UTF-8 byte "\UTFviii@hexbyte{`#1}}%
   \UTFviii@invalid@help%
 }%
 
+%: https://github.com/latex3/latex2e/pull/63
 % override message to format the codepoint correctly
 \gdef\UTFviii@splitcsname#1:#2\relax{%
  #2 (\expandafter\UTFviii@hexcodepoint\expandafter{%
diff --git a/unicodedomino_kernel_fixup.def b/unicodedomino_kernel_fixup.def
index 514add727fc684f833e9f8414ea398e8765b8afc..0f81738fb178ea44eaae0d2034d58c5aefda7477 100644
--- a/unicodedomino_kernel_fixup.def
+++ b/unicodedomino_kernel_fixup.def
@@ -27,6 +27,7 @@
 % run the fixup code only if necessary {{{ begin
 \ifx\UTFviii@check@three\@undefined%
 
+%: not forwarded yet, will only do so once PR#60 (see below) is in
 % new check for illegal sequences
 \def\UTFviii@checkseq#1:#2#3\empty{%
  \ifnum`#2<"80 %
@@ -116,6 +117,7 @@
  \fi%
 }%
 
+%: https://github.com/latex3/latex2e/pull/60
 % bugfix: disallow too large definitions
 \let\unicodedomino@parse@XML@charref\parse@XML@charref%
 \gdef\parse@XML@charref{%
@@ -129,6 +131,7 @@
  \unicodedomino@parse@XML@charref%
 }%
 
+%: https://github.com/latex3/latex2e/pull/60
 % bugfix: add "F4 to the list of permitted lead octets
 % (needs the above fix)
 \begingroup%