diff --git a/doc/changes.txt b/doc/changes.txt
index dfd529b..97bbbfd 100644
--- a/doc/changes.txt
+++ b/doc/changes.txt
@@ -66,3 +66,6 @@
   fell back to `doc` v2 to not overwrite redefinition of `\DescribeMacro`,
   hence not typeset in marginal notes #33
   adjusted pagination
+
+  * thm-kv.dtx:
+  wrapped long code lines to avoid exceeding the page margin
diff --git a/source/thm-kv.dtx b/source/thm-kv.dtx
index 7859126..9fb16c4 100644
--- a/source/thm-kv.dtx
+++ b/source/thm-kv.dtx
@@ -270,14 +270,19 @@
       \else
         \protected@edef\thmt@tmp{%
           % expand \thmt@envname and \thmt@parent
-          \@nx\addtotheorempreheadhook[\thmt@envname @unique]{\@nx\setuniqmark{\thmt@envname.\@nx\@nameuse{the\thmt@parent}}}%
-          \@nx\addtotheorempreheadhook[\thmt@envname @numbered]{\@nx\setuniqmark{\thmt@envname.\@nx\@nameuse{the\thmt@parent}}}%
-          \@nx\addtotheorempreheadhook[\thmt@envname @unique]{\def\@nx\thmt@dummyctrautorefname{\thmt@thmname\@nx\@gobble}}%
-          \@nx\addtotheorempreheadhook[\thmt@envname @numbered]{\def\@nx\thmt@dummyctrautorefname{\thmt@thmname\@nx\@gobble}}%
+          \@nx\addtotheorempreheadhook[\thmt@envname @unique]{%
+            \@nx\setuniqmark{\thmt@envname.\@nx\@nameuse{the\thmt@parent}}}%
+          \@nx\addtotheorempreheadhook[\thmt@envname @numbered]{%
+            \@nx\setuniqmark{\thmt@envname.\@nx\@nameuse{the\thmt@parent}}}%
+          \@nx\addtotheorempreheadhook[\thmt@envname @unique]{%
+            \def\@nx\thmt@dummyctrautorefname{\thmt@thmname\@nx\@gobble}}%
+          \@nx\addtotheorempreheadhook[\thmt@envname @numbered]{%
+            \def\@nx\thmt@dummyctrautorefname{\thmt@thmname\@nx\@gobble}}%
         }%
         \thmt@tmp
       \fi
-      % \addtotheorempreheadhook[\thmt@envname]{\def\thmt@dummyctrautorefname{\thmt@thmname\@gobble}}%
+      % \addtotheorempreheadhook[\thmt@envname]{%
+      %   \def\thmt@dummyctrautorefname{\thmt@thmname\@gobble}}%
     \fi
   }%
 }