diff --git a/qutebrowser/javascript/history.js b/qutebrowser/javascript/history.js
index ba25c8c00..417441bd9 100644
--- a/qutebrowser/javascript/history.js
+++ b/qutebrowser/javascript/history.js
@@ -19,7 +19,7 @@
 
 "use strict";
 
-window.loadHistory = (() => {
+window.loadHistory = (function() {
     // Date of last seen item.
     let lastItemDate = null;
 
diff --git a/qutebrowser/javascript/position_caret.js b/qutebrowser/javascript/position_caret.js
index 13203b781..0ead360fb 100644
--- a/qutebrowser/javascript/position_caret.js
+++ b/qutebrowser/javascript/position_caret.js
@@ -27,7 +27,7 @@
  */
 
 "use strict";
-(() => {
+(function() {
     // FIXME:qtwebengine integrate this with other window._qutebrowser code?
     function isElementInViewport(node) {  // eslint-disable-line complexity
         let i;
diff --git a/qutebrowser/javascript/scroll.js b/qutebrowser/javascript/scroll.js
index 97713367a..7205cb151 100644
--- a/qutebrowser/javascript/scroll.js
+++ b/qutebrowser/javascript/scroll.js
@@ -19,7 +19,7 @@
 
 "use strict";
 
-window._qutebrowser.scroll = (() => {
+window._qutebrowser.scroll = (function() {
     const funcs = {};
 
     funcs.to_perc = (x, y) => {
diff --git a/qutebrowser/javascript/webelem.js b/qutebrowser/javascript/webelem.js
index 5f4a4b5e5..6820a17b3 100644
--- a/qutebrowser/javascript/webelem.js
+++ b/qutebrowser/javascript/webelem.js
@@ -36,7 +36,7 @@
 
 "use strict";
 
-window._qutebrowser.webelem = (() => {
+window._qutebrowser.webelem = (function() {
     const funcs = {};
     const elements = [];