diff --git a/chrome/content/zotero/zoteroPane.xhtml b/chrome/content/zotero/zoteroPane.xhtml
index 41ac9a2a84..eb272d1cab 100644
--- a/chrome/content/zotero/zoteroPane.xhtml
+++ b/chrome/content/zotero/zoteroPane.xhtml
@@ -391,7 +391,7 @@
 								id="view-menuitem-zoom-reset"
 								class="menu-type-reader epub snapshot"
 								label="&zotero.pdfReader.zoomReset;"
-								oncommand="reader.zoomReset()"
+								oncommand="ZoteroStandalone.currentReader.zoomReset()"
 							/>
 							<menuitem
 								id="view-menuitem-zoom-auto"