diff --git a/chrome/skin/default/zotero/overlay.css b/chrome/skin/default/zotero/overlay.css
index 41cdeb2596..65477a1b56 100644
--- a/chrome/skin/default/zotero/overlay.css
+++ b/chrome/skin/default/zotero/overlay.css
@@ -621,6 +621,7 @@
 #item-box-container {
 	display: flex;
 	min-width: 0;
+	min-height: 0;
 }
 
 #retracted-items-banner, #sync-reminder-banner {