$NetBSD$

--- src/libs/learning/policy.cpp.orig	2008-03-15 01:14:41.000000000 +0200
+++ src/libs/learning/policy.cpp	2008-03-15 01:15:30.000000000 +0200
@@ -12,6 +12,9 @@
  ***************************************************************************/
 
 #include <cstring>
+
+using namespace std;
+
 #include <learning/learn_debug.h>
 #include <learning/policy.h>
 #include <learning/MathFunctions.h>
