diff --git a/include/Core/Config.php b/include/Core/Config.php
index 79424c9a1..7b7045a9e 100644
--- a/include/Core/Config.php
+++ b/include/Core/Config.php
@@ -1,5 +1,8 @@
 <?php
 namespace Friendica\Core;
+
+use dbm;
+
 /**
  * @file include/Core/Config.php
  *
diff --git a/include/Core/PConfig.php b/include/Core/PConfig.php
index 33ec93c0e..43735018e 100644
--- a/include/Core/PConfig.php
+++ b/include/Core/PConfig.php
@@ -1,5 +1,8 @@
 <?php
 namespace Friendica\Core;
+
+use dbm;
+
 /**
  * @file include/Core/PConfig.php
  * @brief contains the class with methods for the management