diff --git a/installer/data/mysql/atomicupdate/Bug_39142.pl b/installer/data/mysql/atomicupdate/Bug_39142.pl
new file mode 100755
index 0000000000..aba00480b0
--- /dev/null
+++ b/installer/data/mysql/atomicupdate/Bug_39142.pl
@@ -0,0 +1,20 @@
+use Modern::Perl;
+use Koha::Installer::Output qw(say_warning say_success say_info);
+
+return {
+    bug_number  => "39142",
+    description => "Adding a Debug User permission",
+    up          => sub {
+        my ($args) = @_;
+        my ( $dbh, $out ) = @$args{qw(dbh out)};
+
+        $dbh->do(
+            q{
+            INSERT IGNORE INTO userflags (bit, flag, flagdesc, defaulton)
+            VALUES (32, 'debug', 'Show Debug Interface', 0)
+        }
+        );
+
+        say $out "Added new permission 'Debug'";
+    },
+};
diff --git a/installer/data/mysql/mandatory/userflags.sql b/installer/data/mysql/mandatory/userflags.sql
index 0a30014f66..f1974d93eb 100644
--- a/installer/data/mysql/mandatory/userflags.sql
+++ b/installer/data/mysql/mandatory/userflags.sql
@@ -29,4 +29,5 @@ INSERT INTO userflags (bit, flag, flagdesc, defaulton) VALUES
 (29, 'loggedinlibrary', 'Change logged in library', 0),
 (30, 'preservation', 'Preservation module', 0),
 (31, 'sip2', 'SIP2 module', 0)
+(32, 'debug', 'Show Debug Interface', 0)
 ;