--- a/src/core/model/log.cc	Fri Mar 21 16:57:41 2014 +0100
+++ b/src/core/model/log.cc	Sun Mar 23 16:51:32 2014 +0400
@@ -36,8 +36,8 @@
 
 namespace ns3 {
 
-LogTimePrinter g_logTimePrinter = 0;
-LogNodePrinter g_logNodePrinter = 0;
+static LogTimePrinter g_logTimePrinter = 0;
+static LogNodePrinter g_logNodePrinter = 0;
 
 typedef std::map<std::string, LogComponent *> ComponentList;
 typedef std::map<std::string, LogComponent *>::iterator ComponentListI;