diff --git a/src/wp-includes/css/editor.css b/src/wp-includes/css/editor.css
index 90987629b5..70a42b32b2 100644
--- a/src/wp-includes/css/editor.css
+++ b/src/wp-includes/css/editor.css
@@ -743,6 +743,7 @@ span.mce_redo:before {
 	content: '\f172';
 }
 
+span.mce_help:before,
 span.mce_wp_help:before {
 	content: '\f223';
 }