diff --git a/web_src/css/repo/issue-list.css b/web_src/css/repo/issue-list.css
index 264ec27abc..f123cefd5d 100644
--- a/web_src/css/repo/issue-list.css
+++ b/web_src/css/repo/issue-list.css
@@ -83,7 +83,7 @@
 }
 
 #issue-list .flex-item-body > .flex-text-inline::before {
-  content: '|';
+  content: "|";
 }
 
 .archived-label-filter {