diff --git a/libnetwork/resolver.go b/libnetwork/resolver.go
index 64c73e53b7..c2b1f4e656 100644
--- a/libnetwork/resolver.go
+++ b/libnetwork/resolver.go
@@ -280,7 +280,7 @@ func (r *resolver) handleIPQuery(name string, query *dns.Msg, ipType int) (*dns.
 }
 
 func (r *resolver) handlePTRQuery(ptr string, query *dns.Msg) (*dns.Msg, error) {
-	parts := []string{}
+	var parts []string
 
 	if strings.HasSuffix(ptr, ptrIPv4domain) {
 		parts = strings.Split(ptr, ptrIPv4domain)
diff --git a/libnetwork/sandbox.go b/libnetwork/sandbox.go
index 41e8d01c5d..baf83e46df 100644
--- a/libnetwork/sandbox.go
+++ b/libnetwork/sandbox.go
@@ -351,9 +351,7 @@ func (sb *sandbox) getConnectedEndpoints() []*endpoint {
 	defer sb.Unlock()
 
 	eps := make([]*endpoint, len(sb.endpoints))
-	for i, ep := range sb.endpoints {
-		eps[i] = ep
-	}
+	copy(eps, sb.endpoints)
 
 	return eps
 }