diff --git a/extensions/auto-move-windows/extension.js b/extensions/auto-move-windows/extension.js
index 724d7669..d99244c0 100644
--- a/extensions/auto-move-windows/extension.js
+++ b/extensions/auto-move-windows/extension.js
@@ -35,17 +35,16 @@ class WindowMover {
 
     _updateAppData() {
         let ids = [...this._appConfigs.keys()];
-        let removedApps = [...this._appData.keys()].filter(
-            a => !ids.includes(a.id)
-        );
+        let removedApps = [...this._appData.keys()]
+            .filter(a => !ids.includes(a.id));
         removedApps.forEach(app => {
             app.disconnect(this._appData.get(app).windowsChangedId);
             this._appData.delete(app);
         });
 
-        let addedApps = ids.map(id => this._appSystem.lookup_app(id)).filter(
-            app => app && !this._appData.has(app)
-        );
+        let addedApps = ids
+            .map(id => this._appSystem.lookup_app(id))
+            .filter(app => app && !this._appData.has(app));
         addedApps.forEach(app => {
             let data = {
                 windowsChangedId: app.connect('windows-changed',
@@ -94,9 +93,9 @@ class WindowMover {
         // the window still exists and is just moved to a different workspace
         // or something; assume it'll be added back immediately, so keep it
         // to avoid moving it again
-        windows.push(...data.windows.filter(
-            w => !windows.includes(w) && w.get_compositor_private() !== null
-        ));
+        windows.push(...data.windows.filter(w => {
+            return !windows.includes(w) && w.get_compositor_private() !== null;
+        }));
 
         let workspaceNum = this._appConfigs.get(app.id);
         windows.filter(w => !data.windows.includes(w)).forEach(window => {