diff -Nru multitail-6.4.2/debian/changelog multitail-6.4.2/debian/changelog
--- multitail-6.4.2/debian/changelog	2017-05-27 10:40:02.000000000 +0200
+++ multitail-6.4.2/debian/changelog	2018-02-23 19:24:18.000000000 +0100
@@ -1,3 +1,9 @@
+multitail (6.4.2-3ubuntu1) bionic; urgency=medium
+
+  * Add adapt_to_new_ttyname_behaviour.diff (LP: #1669578)
+
+ -- José Manuel Santamaría Lema <panfaust@gmail.com>  Fri, 23 Feb 2018 19:24:18 +0100
+
 multitail (6.4.2-3) unstable; urgency=medium
 
   * upload to unstable
diff -Nru multitail-6.4.2/debian/patches/adapt_to_new_ttyname_behaviour.diff multitail-6.4.2/debian/patches/adapt_to_new_ttyname_behaviour.diff
--- multitail-6.4.2/debian/patches/adapt_to_new_ttyname_behaviour.diff	1970-01-01 01:00:00.000000000 +0100
+++ multitail-6.4.2/debian/patches/adapt_to_new_ttyname_behaviour.diff	2018-02-23 19:24:18.000000000 +0100
@@ -0,0 +1,25 @@
+Author: José Manuel Santamaría Lema <panfaust@gmail.com>
+Description: This is a fix for LP: 
+ According to the ttyname(3) manpage ttyname() return ENODEV if:
+ "File descriptor refers to a slave pseudoterminal device but the corresponding
+ pathname could not be found".
+ This seems to be the case when executing multitail inside LXD containers;
+ without this patch it would fail with this message:
+
+ The following problem occured:
+ -----------------------------
+ ttyname(0) failed.
+ If this is a bug, please report the following information:
+ The last system call returned: 19 which means "No such device"
+
+--- a/mt.c
++++ b/mt.c
+@@ -2707,6 +2707,8 @@ void check_for_valid_stdin()
+ 	{
+ 		if (errno == ENOTTY || errno == EINVAL)
+ 			error_exit(TRUE, FALSE, "Please use -j/-J when you want to pipe something into MultiTail.\n");
++		else if (errno == ENODEV)
++			return;
+ 		else
+ 			error_exit(TRUE, FALSE, "ttyname(0) failed.\n");
+ 	}
diff -Nru multitail-6.4.2/debian/patches/series multitail-6.4.2/debian/patches/series
--- multitail-6.4.2/debian/patches/series	2017-02-01 21:38:20.000000000 +0100
+++ multitail-6.4.2/debian/patches/series	2018-02-23 19:24:18.000000000 +0100
@@ -1,3 +1,4 @@
 01_makefile_fixes.diff
 03_manpage_lowercase.diff
 04_remove_custom_CFLAGS.diff
+adapt_to_new_ttyname_behaviour.diff