diff --git a/hardware/PiFace/37-rpi-piface.js b/hardware/PiFace/37-rpi-piface.js
index 901c2a8b..0c251f86 100644
--- a/hardware/PiFace/37-rpi-piface.js
+++ b/hardware/PiFace/37-rpi-piface.js
@@ -107,7 +107,7 @@ module.exports = function(RED) {
                 if (msg.payload === "true") { msg.payload = true; }
                 if (msg.payload === "false") { msg.payload = false; }
                 var out = Number(msg.payload);
-                if ((out === 0)|(out === 1)) {
+                if ((out === 0)||(out === 1)) {
                     exec("gpio -p write "+node.pin+" "+out, function(err,stdout,stderr) {
                         if (err) {
                             node.status({fill:"red",shape:"ring",text:"error"});
diff --git a/hardware/PiLiter/39-rpi-piliter.js b/hardware/PiLiter/39-rpi-piliter.js
index 33446a9c..59a60553 100644
--- a/hardware/PiLiter/39-rpi-piliter.js
+++ b/hardware/PiLiter/39-rpi-piliter.js
@@ -1,7 +1,6 @@
 
 module.exports = function(RED) {
     "use strict";
-    var util = require("util");
     var spawn = require('child_process').spawn;
     var fs = require('fs');
 
@@ -59,7 +58,7 @@ module.exports = function(RED) {
                 node.child = spawn(gpioCommand, ["byte",node.dir]);
                 node.on("input", function(msg) {
                     var out = msg.payload;
-                    if ((out === 1)|(out === true)|(out === "1")|(out === "on")) {
+                    if ((out === 1)||(out === true)||(out === "1")||(out === "on")) {
                         out = 255;
                     }
                     else { out = 0; }
diff --git a/hardware/intel/mraa-gpio-led.js b/hardware/intel/mraa-gpio-led.js
index d9a4ce08..7135bab5 100644
--- a/hardware/intel/mraa-gpio-led.js
+++ b/hardware/intel/mraa-gpio-led.js
@@ -8,7 +8,9 @@ module.exports = function(RED) {
         if (this.pin == 0) {
             this.user1_green = new m.Led(0); /*user-led1-green*/
             this.user1_red = new m.Led(1); /*user-led1-red*/
-        } if(this.pin == 1) {
+        }
+
+        if (this.pin == 1) {
             this.user2_green = new m.Led(2); /*user-led2-green*/
             this.user2_red = new m.Led(3); /*user-led2-red*/
         }
diff --git a/io/stomp/18-stomp.js b/io/stomp/18-stomp.js
index 4887a674..d9942ce7 100644
--- a/io/stomp/18-stomp.js
+++ b/io/stomp/18-stomp.js
@@ -483,7 +483,7 @@ module.exports = function(RED) {
                 const topic = node.topic || msg.topic;
                 if (topic.length > 0) {
                     node.serverConnection.ack(topic, msg.messageId, msg.transaction);
-                } else if (!topic.length > 0) {
+                } else if (!(topic.length > 0)) {
                     node.warn('No valid publish topic');
 
                 } else {