diff --git a/Userland/Libraries/LibWeb/CSS/Default.css b/Userland/Libraries/LibWeb/CSS/Default.css
index 6db9a63de6..f74d26ce64 100644
--- a/Userland/Libraries/LibWeb/CSS/Default.css
+++ b/Userland/Libraries/LibWeb/CSS/Default.css
@@ -41,6 +41,11 @@ ins {
     text-decoration: underline;
 }
 
+s,
+del {
+    text-decoration: line-through;
+}
+
 strong,
 b {
     font-weight: bold;