diff --git a/debian/patches/20_check_apt_unknown_escape_sequence b/debian/patches/20_check_apt_unknown_escape_sequence
new file mode 100644
index 0000000..3c7674e
--- /dev/null
+++ b/debian/patches/20_check_apt_unknown_escape_sequence
@@ -0,0 +1,22 @@
+From 28553e8d1cc56de12e4c9f7705a92f0e0e86d9d9 Mon Sep 17 00:00:00 2001
+From: RincewindsHat <12514511+RincewindsHat@users.noreply.github.com>
+Date: Mon, 19 Dec 2022 17:15:49 +0100
+Subject: [PATCH] Fix unknown escape sequence error output
+
+---
+ plugins/check_apt.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/plugins/check_apt.c b/plugins/check_apt.c
+index d7be57505..f70fec16b 100644
+--- a/plugins/check_apt.c
++++ b/plugins/check_apt.c
+@@ -530,7 +530,7 @@ print_help (void)
+   printf ("    %s\n", _("this REGEXP, the plugin will return CRITICAL status.  Can be specified"));
+   printf ("    %s\n", _("multiple times like above.  Default is a regexp matching security"));
+   printf ("    %s\n", _("upgrades for Debian and Ubuntu:"));
+-  printf ("    \t\%s\n", SECURITY_RE);
++  printf ("    \t%s\n", SECURITY_RE);
+   printf ("    %s\n", _("Note that the package must first match the include list before its"));
+   printf ("    %s\n", _("information is compared against the critical list."));
+   printf (" %s\n", "-o, --only-critical");
diff --git a/debian/patches/series b/debian/patches/series
index 4b7a686..ad3b0d3 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -8,3 +8,4 @@
 17_check_curl_detect_ipv6
 18_check_icmp_help
 19_check_disk_fs_usage
+20_check_apt_unknown_escape_sequence