diff --git a/netstatus/netstatus.go b/netstatus/netstatus.go
index 287ade4..30152a1 100644
--- a/netstatus/netstatus.go
+++ b/netstatus/netstatus.go
@@ -80,7 +80,7 @@ func PortOpen(protocol string, port uint16) bool {
 	if err != nil {
 		log.Fatal(err)
 	}
-	return CanConnect("localhost"+fmt.Sprint(port), protocol, dur)
+	return CanConnect(fmt.Sprintf("localhost:%v", port), protocol, dur)
 }
 
 // ValidIP returns a boolean answering the question "is this a valid IPV4/6
diff --git a/netstatus/netstatus_test.go b/netstatus/netstatus_test.go
index 7a1d70d..7100bc8 100644
--- a/netstatus/netstatus_test.go
+++ b/netstatus/netstatus_test.go
@@ -54,7 +54,7 @@ func TestOpenPorts(t *testing.T) {
 				t.Errorf(msg+": %d", port)
 			} else {
 				dur, _ := time.ParseDuration("10s")
-				if CanConnect("localhost:"+fmt.Sprint(port), protocol, dur) {
+				if CanConnect(fmt.Sprintf("localhost:%v", port), protocol, dur) {
 					couldConnect++
 				}
 			}