diff --git a/src/nlsr_nexthop.hpp b/src/nlsr_nexthop.hpp
index 17393c6..b5d34f6 100644
--- a/src/nlsr_nexthop.hpp
+++ b/src/nlsr_nexthop.hpp
@@ -3,6 +3,8 @@
 
 #include<iostream>
 
+namespace nlsr {
+
 using namespace std;
 
 class NextHop
@@ -48,4 +50,6 @@
 ostream&
 operator<<(ostream& os, NextHop& nh);
 
+}//namespace nlsr
+
 #endif