diff --git a/coreapi/TunnelManager.cc b/coreapi/TunnelManager.cc
index b8f1dae48..3e998cb74 100644
--- a/coreapi/TunnelManager.cc
+++ b/coreapi/TunnelManager.cc
@@ -25,6 +25,7 @@
 
 
 using namespace belledonnecomm;
+using namespace ::std;
 
 Mutex TunnelManager::sMutex;