diff --git a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h
index 11b9cc6a99..a73416a126 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h
+++ b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h
@@ -44,7 +44,9 @@ public:
         return adopt(*new CSSStyleSheet(move(rules)));
     }
 
-    virtual ~CSSStyleSheet();
+    virtual ~CSSStyleSheet() override;
+
+    virtual String type() const override { return "text/css"; }
 
     const NonnullRefPtrVector<CSSRule>& rules() const { return m_rules; }
     NonnullRefPtrVector<CSSRule>& rules() { return m_rules; }
diff --git a/Userland/Libraries/LibWeb/CSS/StyleSheet.h b/Userland/Libraries/LibWeb/CSS/StyleSheet.h
index 7f8b3dec13..064290c8ba 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleSheet.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleSheet.h
@@ -41,6 +41,8 @@ public:
 
     virtual ~StyleSheet() = default;
 
+    virtual String type() const = 0;
+
     DOM::Element* owner_node() { return m_owner_node; }
     void set_owner_node(DOM::Element*);
 
diff --git a/Userland/Libraries/LibWeb/CSS/StyleSheet.idl b/Userland/Libraries/LibWeb/CSS/StyleSheet.idl
index 315a0939ce..20cfcfd8c1 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleSheet.idl
+++ b/Userland/Libraries/LibWeb/CSS/StyleSheet.idl
@@ -1,8 +1,8 @@
 interface StyleSheet {
 
     readonly attribute Element? ownerNode;
+    readonly attribute CSSOMString type;
 
-    // readonly attribute CSSOMString type;
     // readonly attribute USVString? href;
     // readonly attribute CSSStyleSheet? parentStyleSheet;
     // readonly attribute DOMString? title;