diff --git a/debian/changelog b/debian/changelog
index a7abd61..c07e48c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,8 @@ monitoring-plugins (2.2-5) UNRELEASED; urgency=medium
 
   [ Bas Couwenberg ]
   * Bump Standards-Version to 4.3.0, no changes.
+  * Add patch to fix FTBFS with MariaDB 10.3.
+    (closes: #919375)
 
   [ Andreas Henriksson ]
   * Pass PATH_TO_APTGET=/usr/bin/apt-get to configure
diff --git a/debian/patches/mariadb-10.3.patch b/debian/patches/mariadb-10.3.patch
new file mode 100644
index 0000000..66eed46
--- /dev/null
+++ b/debian/patches/mariadb-10.3.patch
@@ -0,0 +1,30 @@
+Description: Add support for MariaDB 10.3.
+Author: Bas Couwenberg <sebastic@debian.org>
+Bug-Debian: https://bugs.debian.org/919395
+
+--- a/plugins/check_mysql.c
++++ b/plugins/check_mysql.c
+@@ -45,6 +45,10 @@ const char *email = "devel@monitoring-pl
+ #include <mysqld_error.h>
+ #include <errmsg.h>
+ 
++#ifndef MYSQL_PORT
++#define MYSQL_PORT 3306
++#endif
++
+ char *db_user = NULL;
+ char *db_host = NULL;
+ char *db_socket = NULL;
+--- a/plugins/check_mysql_query.c
++++ b/plugins/check_mysql_query.c
+@@ -41,6 +41,10 @@ const char *email = "devel@monitoring-pl
+ #include <mysql.h>
+ #include <errmsg.h>
+ 
++#ifndef MYSQL_PORT
++#define MYSQL_PORT 3306
++#endif
++
+ char *db_user = NULL;
+ char *db_host = NULL;
+ char *db_socket = NULL;
diff --git a/debian/patches/series b/debian/patches/series
index ac7d715..f11fc1d 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -4,3 +4,4 @@
 11_check_dhcp_MSG_PEAK
 12_check_apt_only_crit
 13_check_apt_list_packages
+mariadb-10.3.patch