diff --git a/module/repo/css/browse.css b/module/repo/css/browse.css
index 35ae8663e8..5a718bb0b5 100644
--- a/module/repo/css/browse.css
+++ b/module/repo/css/browse.css
@@ -11,3 +11,7 @@
 .c-commit {width: 70px;}
 .c-committer {width: 100px;}
 .c-icon {width: 30px;}
+
+/* Fix bug #21893. */
+.in #sidebar>.sidebar-toggle>.icon-angle-left:before {content: "\e315";}
+.hide-sidebar #sidebar>.sidebar-toggle>.icon-angle-left:before {content: "\e314";}