diff --git a/boot.php b/boot.php
index 070dcf7266..ed4fe10a3a 100644
--- a/boot.php
+++ b/boot.php
@@ -38,7 +38,7 @@ define ( 'FRIENDICA_PLATFORM',     'Friendica');
 define ( 'FRIENDICA_CODENAME',     'Asparagus');
 define ( 'FRIENDICA_VERSION',      '3.5.2-dev' );
 define ( 'DFRN_PROTOCOL_VERSION',  '2.23'    );
-define ( 'DB_UPDATE_VERSION',      1216      );
+define ( 'DB_UPDATE_VERSION',      1217      );
 
 /**
  * @brief Constant with a HTML line break.
diff --git a/database.sql b/database.sql
index 7ed19f439c..9d56957100 100644
--- a/database.sql
+++ b/database.sql
@@ -159,7 +159,7 @@ CREATE TABLE IF NOT EXISTS `contact` (
 	`writable` tinyint(1) NOT NULL DEFAULT 0,
 	`forum` tinyint(1) NOT NULL DEFAULT 0,
 	`prv` tinyint(1) NOT NULL DEFAULT 0,
-	`contact-type` int(11) unsigned NOT NULL DEFAULT 0,
+	`contact-type` int(11) NOT NULL DEFAULT 0,
 	`hidden` tinyint(1) NOT NULL DEFAULT 0,
 	`archive` tinyint(1) NOT NULL DEFAULT 0,
 	`pending` tinyint(1) NOT NULL DEFAULT 1,
diff --git a/include/dbstructure.php b/include/dbstructure.php
index 48cc02d2d1..406ad6c93d 100644
--- a/include/dbstructure.php
+++ b/include/dbstructure.php
@@ -671,7 +671,7 @@ function db_definition($charset) {
 					"writable" => array("type" => "tinyint(1)", "not null" => "1", "default" => "0"),
 					"forum" => array("type" => "tinyint(1)", "not null" => "1", "default" => "0"),
 					"prv" => array("type" => "tinyint(1)", "not null" => "1", "default" => "0"),
-					"contact-type" => array("type" => "int(11) unsigned", "not null" => "1", "default" => "0"),
+					"contact-type" => array("type" => "int(11)", "not null" => "1", "default" => "0"),
 					"hidden" => array("type" => "tinyint(1)", "not null" => "1", "default" => "0"),
 					"archive" => array("type" => "tinyint(1)", "not null" => "1", "default" => "0"),
 					"pending" => array("type" => "tinyint(1)", "not null" => "1", "default" => "1"),
diff --git a/update.php b/update.php
index 8404f5bf26..4e945d2091 100644
--- a/update.php
+++ b/update.php
@@ -1,6 +1,6 @@
 <?php
 
-define('UPDATE_VERSION' , 1216);
+define('UPDATE_VERSION' , 1217);
 
 /**
  *