diff --git a/classes/db.php b/classes/db.php
index 70b97d0ee99932649a97eaa207f43b1a1ba06ad6..6199c82bbb941cd10c344128fc5c574b9f71a36e 100755
--- a/classes/db.php
+++ b/classes/db.php
@@ -92,7 +92,7 @@ class Db
 		return self::$instance;
 	}
 
-	public static function get() {
+	public static function get() : Db {
 		if (self::$instance == null)
 			self::$instance = new self();
 
@@ -103,7 +103,7 @@ class Db
 		return self::$instance->adapter;
 	}
 
-	public static function pdo() {
+	public static function pdo() : PDO {
 		if (self::$instance == null)
 			self::$instance = new self();
 
diff --git a/classes/pluginhost.php b/classes/pluginhost.php
index d94279706071a14016ea99205a14f85a49948f3b..8c5e31ad336c0cde09b4171862dd551849eb1291 100755
--- a/classes/pluginhost.php
+++ b/classes/pluginhost.php
@@ -111,7 +111,7 @@ class PluginHost {
 		return Db::get();
 	}
 
-	function get_pdo() {
+	function get_pdo(): PDO {
 		return $this->pdo;
 	}