--- a/db_bridge/postgresql_db.cpp
+++ b/db_bridge/postgresql_db.cpp
@@ -3,6 +3,7 @@
  * Copyright 2008 (C) Markus Broeker
  */
 
+#include <cstdlib>
 #include <postgresql_db.h>
 #include <exception>
 #include <console.h>