diff --git a/src/internet-node/ipv4-interface.cc b/src/internet-node/ipv4-interface.cc
index aead13ad0..9d750f068 100644
--- a/src/internet-node/ipv4-interface.cc
+++ b/src/internet-node/ipv4-interface.cc
@@ -91,7 +91,7 @@ void
 Ipv4Interface::SetMetric (uint16_t metric)
 {
   NS_LOG_FUNCTION;
-  NS_LOG_PARAMS ("(" << metric << ")");
+  NS_LOG_PARAMS (metric);
   m_metric = metric;
 }
 
diff --git a/src/internet-node/ipv4-l3-protocol.cc b/src/internet-node/ipv4-l3-protocol.cc
index 105995369..9401d7559 100644
--- a/src/internet-node/ipv4-l3-protocol.cc
+++ b/src/internet-node/ipv4-l3-protocol.cc
@@ -736,7 +736,7 @@ void
 Ipv4L3Protocol::SetMetric (uint32_t i, uint16_t metric)
 {
   NS_LOG_FUNCTION;
-  NS_LOG_PARAMS ("(" << i << ", " << metric << ")");
+  NS_LOG_PARAMS (i << metric);
   Ptr<Ipv4Interface> interface = GetInterface (i);
   interface->SetMetric (metric);
 }
@@ -745,7 +745,7 @@ uint16_t
 Ipv4L3Protocol::GetMetric (uint32_t i) const
 {
   NS_LOG_FUNCTION;
-  NS_LOG_PARAMS ("(" << i << ")");
+  NS_LOG_PARAMS (i);
   Ptr<Ipv4Interface> interface = GetInterface (i);
   return interface->GetMetric ();
 }