diff --git a/old-ui/app/components/range-slider.js b/old-ui/app/components/range-slider.js
index 823f5eb01..bae740a74 100644
--- a/old-ui/app/components/range-slider.js
+++ b/old-ui/app/components/range-slider.js
@@ -35,7 +35,7 @@ RangeSlider.prototype.render = function () {
         step: increment,
         style: range,
         value: state.value || defaultValue,
-        onChange: mirrorInput ? this.mirrorInputs.bind(this, event) : onInput,
+        onChange: mirrorInput ? this.mirrorInputs.bind(this) : onInput,
       }),
 
       // Mirrored input for range
@@ -47,7 +47,7 @@ RangeSlider.prototype.render = function () {
         value: state.value || defaultValue,
         step: increment,
         style: input,
-        onChange: this.mirrorInputs.bind(this, event),
+        onChange: this.mirrorInputs.bind(this),
       }) : null,
     ])
   )
diff --git a/old-ui/app/config.js b/old-ui/app/config.js
index 7da3694ac..508770bd4 100644
--- a/old-ui/app/config.js
+++ b/old-ui/app/config.js
@@ -42,7 +42,7 @@ ConfigScreen.prototype.render = function () {
       // subtitle and nav
       h('.section-title.flex-row.flex-center', [
         h('i.fa.fa-arrow-left.fa-lg.cursor-pointer', {
-          onClick: (event) => {
+          onClick: () => {
             state.dispatch(actions.goHome())
           },
         }),