diff --git a/adminer/drivers/mysql.inc.php b/adminer/drivers/mysql.inc.php
index d400f26f..9e49330e 100644
--- a/adminer/drivers/mysql.inc.php
+++ b/adminer/drivers/mysql.inc.php
@@ -1019,6 +1019,10 @@ if (!defined("DRIVER")) {
 		return queries("KILL " . number($val));
 	}
 
+	function connection_id(){
+		return "SELECT CONNECTION_ID()";
+	}
+
 	function max_connections() {
 		global $connection;
 		return $connection->result("SELECT @@max_connections");
diff --git a/adminer/drivers/pgsql.inc.php b/adminer/drivers/pgsql.inc.php
index b70d96cd..9425760c 100644
--- a/adminer/drivers/pgsql.inc.php
+++ b/adminer/drivers/pgsql.inc.php
@@ -638,6 +638,10 @@ AND typelem = 0"
 		return queries("SELECT pg_terminate_backend(" . number($val).")");
 	}
 
+	function connection_id(){
+		return "SELECT pg_backend_pid()";
+	}
+
 	function max_connections() {
 		global $connection;
 		return $connection->result("SHOW max_connections");
diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index 68be3a0b..e7bdb162 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -1215,7 +1215,7 @@ function slow_query($query) {
 	$db = $adminer->database();
 	$timeout = $adminer->queryTimeout();
 	if (support("kill") && is_object($connection2 = connect()) && ($db == "" || $connection2->select_db($db))) {
-		$kill = $connection2->result("SELECT CONNECTION_ID()"); // MySQL and MySQLi can use thread_id but it's not in PDO_MySQL
+		$kill = $connection2->result(connection_id()); // MySQL and MySQLi can use thread_id but it's not in PDO_MySQL
 		?>
 <script type="text/javascript">
 var timeout = setTimeout(function () {