diff --git a/chrome/content/zotero/elements/itemPaneSidenav.js b/chrome/content/zotero/elements/itemPaneSidenav.js
index fb7150a727..34554a4fc5 100644
--- a/chrome/content/zotero/elements/itemPaneSidenav.js
+++ b/chrome/content/zotero/elements/itemPaneSidenav.js
@@ -192,7 +192,7 @@
 		
 		init() {
 			this._buttonContainer = this.querySelector('.inherit-flex');
-			for (let toolbarbutton of this.querySelectorAll('toolbarbutton')) {
+			for (let toolbarbutton of this.querySelectorAll('toolbarbutton[data-pane]')) {
 				let pane = toolbarbutton.dataset.pane;
 				
 				let pinnable = this.isPanePinnable(pane);