diff --git a/chrome/content/zotero/reader.xhtml b/chrome/content/zotero/reader.xhtml
index fa29e4d584..c2cce514dd 100644
--- a/chrome/content/zotero/reader.xhtml
+++ b/chrome/content/zotero/reader.xhtml
@@ -206,7 +206,7 @@
 					type="checkbox"
 					oncommand="reader.spreadMode = 2"
 				/>
-				<menuseparator class="menu-type-reader pdf epub"/>
+				<menuseparator class="menu-type-reader epub"/>
 				<menuitem
 					id="view-menuitem-scrolled"
 					class="menu-type-reader epub"
@@ -221,7 +221,7 @@
 					label="&zotero.pdfReader.paginated;"
 					oncommand="reader.flowMode = 'paginated'"
 				/>
-				<menuseparator class="menu-type-reader"/>
+				<menuseparator class="menu-type-reader pdf epub"/>
 				<menuitem
 					id="view-menuitem-zoom-in"
 					class="menu-type-reader"