diff --git a/js/src/dropdown.js b/js/src/dropdown.js
index 3e1ef5fd4f5b..7d5421a56d93 100644
--- a/js/src/dropdown.js
+++ b/js/src/dropdown.js
@@ -192,7 +192,7 @@ class Dropdown extends BaseComponent {
     if ('ontouchstart' in document.documentElement &&
       !parent.closest(SELECTOR_NAVBAR_NAV)) {
       [].concat(...document.body.children)
-        .forEach(elem => EventHandler.on(elem, 'mouseover', null, noop))
+        .forEach(elem => EventHandler.on(elem, 'mouseover', noop))
     }
 
     this._element.focus()
@@ -222,7 +222,7 @@ class Dropdown extends BaseComponent {
     // empty mouseover listeners we added for iOS support
     if ('ontouchstart' in document.documentElement) {
       [].concat(...document.body.children)
-        .forEach(elem => EventHandler.off(elem, 'mouseover', null, noop))
+        .forEach(elem => EventHandler.off(elem, 'mouseover', noop))
     }
 
     if (this._popper) {
@@ -435,7 +435,7 @@ class Dropdown extends BaseComponent {
       // empty mouseover listeners we added for iOS support
       if ('ontouchstart' in document.documentElement) {
         [].concat(...document.body.children)
-          .forEach(elem => EventHandler.off(elem, 'mouseover', null, noop))
+          .forEach(elem => EventHandler.off(elem, 'mouseover', noop))
       }
 
       if (context._popper) {