diff --git a/base/changes.txt b/base/changes.txt
index 080a33889..eb52d03e7 100644
--- a/base/changes.txt
+++ b/base/changes.txt
@@ -16,6 +16,12 @@ are not part of the distribution.
 
 	* ltkeys.dtx: Correct handling of unknown option list
 
+2022-10-20  Joseph Wright  <Joseph.Wright@latex-project.org>
+
+	* ltclass.dtx, ltkeys.dtx:
+	Correct an argument for a message
+	Define key option handler in ltkeys
+
 2022-10-10  David Carlisle  <David.Carlisle@latex-project.org>
 
 	* ltclass.dtx: use \protected@edef rather than \edef when expanding option lists
diff --git a/base/ltclass.dtx b/base/ltclass.dtx
index 8d946a326..a525b6f57 100644
--- a/base/ltclass.dtx
+++ b/base/ltclass.dtx
@@ -2186,13 +2186,15 @@
 %    \end{macrocode}
 % \changes{v1.5b}{2022/03/18}{Switch to \cs{ProcessKeyOptions}}
 % \changes{v1.5c}{2022/06/20}{Pass raw options to \cs{ProcessKeyOptions}}
+% \changes{v1.5e}{2022/10/20}
+%         {Define key option handler in \pkg{ltkeys}}
 %    In the current preferred approach, a key family name will exist for
 %    processing using \pkg{ltkeys}. In that case, we replace the previous
 %    package options with the new ones, then call the key handler.
 %    Otherwise, we use the more classical clash handler.
 %    \begin{macrocode}
     {%
-      \@ifundefined{opt@fam@\@currname.\@currext}
+      \@ifundefined{opt@handler@\@currname.\@currext}
         {\@onefilewithoptions@clashchk{#2}}
         {%
 %    \end{macrocode}
@@ -2201,9 +2203,7 @@
           \expandafter\protected@edef\csname opt@\@currname.\@currext\endcsname
             {\zap@space#2 \@empty}%
           \@namedef{@raw@opt@\@currname.\@currext}{#2}%
-          \expandafter\expandafter\expandafter\ProcessKeyOptions
-            \expandafter\expandafter\expandafter
-              [\csname opt@fam@\@currname.\@currext\endcsname]%
+          \@nameuse{opt@handler@\@currname.\@currext}%
         }%
     }%
     {\makeatletter
diff --git a/base/ltkeys.dtx b/base/ltkeys.dtx
index b418aa353..edf12f7cb 100644
--- a/base/ltkeys.dtx
+++ b/base/ltkeys.dtx
@@ -209,6 +209,8 @@
 % \begin{macro}{\@@_options_aux:n}
 % \changes{v1.0b}{2022/01/15}
 %         {Clear option list in end-of-package hook}
+% \changes{v1.0l}{2022/10/20}
+%         {Define key option handler in \pkg{ltkeys}}
 % \changes{v1.0i}{2022/07/05}{Support \cs{CurrentOption}}
 % \begin{macro}{\@@_options_end:}
 %   The main function calls functions to collect up the global and local
@@ -225,7 +227,8 @@
   { \@@_options_expand_module:Nn \@@_options_aux:n {#1} }
 \cs_new_protected:Npn \@@_options_aux:n #1
   {
-    \cs_gset_nopar:cpn { opt@fam@\@currname.\@currext } {#1}
+    \cs_gset_protected:cpn { opt@handler@\@currname.\@currext }
+      { \ProcessKeyOptions [ #1 ] }
     \cs_set_protected:Npn \@@_option_end: { }
     \clist_clear:N \l_@@_options_clist
     \@@_options_global:n {#1}
@@ -477,6 +480,7 @@
 %
 % \begin{macro}{\@@_options_loaded:n}
 % \begin{macro}{\@@_options_loaded:nn}
+% \changes{v1.0l}{2022/10/20}{Correct an argument for a message}
 %   Indicates that the load-time options for a package have been processed:
 %   once this has happened, make them unavailable either with a warning or
 %   an error.
@@ -498,11 +502,9 @@
 \cs_new_protected:Npn \@@_options_loaded:nn #1#2
   {
     \bool_if:NTF \l_@@_options_loading_bool
-      {
-        \msg_warning:nnxx { keys } { load-option-ignored }
-          { \use:c { opt@fam@\@currname.\@currext } } {#2}
-      }
-      { \msg_error:nnnn { keys } { load-only } {#1} {#2} }
+      { \msg_warning:nnnn { keys } { load-option-ignored } }
+      { \msg_error:nnnn { keys } { load-only } }
+        {#1} {#2}
   }
 %    \end{macrocode}
 % \changes{v1.0j}{2022/07/23}