diff -Nru automysqlbackup-2.6+debian.4/debian/changelog automysqlbackup-2.6+debian.4/debian/changelog
--- automysqlbackup-2.6+debian.4/debian/changelog	2014-07-23 08:21:08.000000000 +0000
+++ automysqlbackup-2.6+debian.4/debian/changelog	2018-09-21 11:13:00.000000000 +0000
@@ -1,3 +1,10 @@
+automysqlbackup (2.6+debian.4-2) unstable; urgency=medium
+
+  * Fix "monthly backup fails with line 427", thanks to Sergi Baila for
+    reporting (Closes: #889064).
+
+ -- Thomas Goirand <zigo@debian.org>  Fri, 21 Sep 2018 13:13:00 +0200
+
 automysqlbackup (2.6+debian.4-1) unstable; urgency=medium
 
   * New upstream release:
diff -Nru automysqlbackup-2.6+debian.4/debian/patches/fix-too-many-argument.patch automysqlbackup-2.6+debian.4/debian/patches/fix-too-many-argument.patch
--- automysqlbackup-2.6+debian.4/debian/patches/fix-too-many-argument.patch	1970-01-01 00:00:00.000000000 +0000
+++ automysqlbackup-2.6+debian.4/debian/patches/fix-too-many-argument.patch	2018-09-21 11:12:55.000000000 +0000
@@ -0,0 +1,17 @@
+Description: Fix monthly backup fails with line 427: [: too many arguments
+Author: Thomas Goirand <zigo@debian.org>
+Bug-Debian: https://bugs.debian.org/889064
+Forwarded: no
+Last-Update: 2018-09-21
+
+--- automysqlbackup-2.6+debian.4.orig/automysqlbackup
++++ automysqlbackup-2.6+debian.4/automysqlbackup
+@@ -424,7 +424,7 @@ exec 2> $LOGERR     # stderr replaced wi
+ dbdump () {
+ 	touch $2
+ 	chmod 600 $2
+-	if [ $1 = "information_schema" ] ; then
++	if [ "$1" = "information_schema" ] ; then
+ 		NEWOPT="--skip-opt ${OPT}"
+ 	else
+ 		NEWOPT="--opt $OPT"
diff -Nru automysqlbackup-2.6+debian.4/debian/patches/series automysqlbackup-2.6+debian.4/debian/patches/series
--- automysqlbackup-2.6+debian.4/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ automysqlbackup-2.6+debian.4/debian/patches/series	2018-09-21 11:12:19.000000000 +0000
@@ -0,0 +1 @@
+fix-too-many-argument.patch