diff --git a/etcdserver/etcdhttp/client.go b/etcdserver/etcdhttp/client.go
index f35e5fdd5..c8e59bea3 100644
--- a/etcdserver/etcdhttp/client.go
+++ b/etcdserver/etcdhttp/client.go
@@ -193,7 +193,7 @@ func (h *adminMembersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request)
 			writeError(w, err)
 			return
 		}
-		log.Printf("etcdhttp: added node %x with peer urls %v", m.ID, req.PeerURLs)
+		log.Printf("etcdhttp: added node %x with peer urls %s", m.ID, req.PeerURLs)
 
 		res := newMember(m)
 		w.Header().Set("Content-Type", "application/json")
diff --git a/pkg/types/urls.go b/pkg/types/urls.go
index 034809a90..c36eb6bab 100644
--- a/pkg/types/urls.go
+++ b/pkg/types/urls.go
@@ -27,6 +27,10 @@ import (
 
 type URLs []url.URL
 
+func (us URLs) String() string {
+	return strings.Join(us.StringSlice(), ",")
+}
+
 func (us *URLs) Sort() {
 	sort.Sort(us)
 }