diff --git a/src/routing/global-routing/global-router-interface.cc b/src/routing/global-routing/global-router-interface.cc
index 24a84be06..e70d2ec04 100644
--- a/src/routing/global-routing/global-router-interface.cc
+++ b/src/routing/global-routing/global-router-interface.cc
@@ -535,8 +535,7 @@ GlobalRouter::GetLSA (uint32_t n, GlobalRouterLSA &lsa) const
 GlobalRouter::GetAdjacent(Ptr<NetDevice> nd, Ptr<Channel> ch) const
 {
 
-  uint32_t nDevices = ch->GetNDevices();
-  NS_ASSERT_MSG(nDevices == 2, 
+  NS_ASSERT_MSG(ch->GetNDevices() == 2, 
     "GlobalRouter::GetAdjacent (): Channel with other than two devices");
 //
 // This is a point to point channel with two endpoints.  Get both of them.