diff --git a/Userland/Libraries/LibWeb/SVG/SVGTransformList.cpp b/Userland/Libraries/LibWeb/SVG/SVGTransformList.cpp
index 664d1847dac..0548d7724e0 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGTransformList.cpp
+++ b/Userland/Libraries/LibWeb/SVG/SVGTransformList.cpp
@@ -30,6 +30,13 @@ WebIDL::UnsignedLong SVGTransformList::length()
     return m_transforms.size();
 }
 
+// https://svgwg.org/svg2-draft/single-page.html#types-__svg__SVGNameList__numberOfItems
+WebIDL::UnsignedLong SVGTransformList::number_of_items()
+{
+    // The length and numberOfItems IDL attributes represents the length of the list, and on getting simply return the length of the list.
+    return m_transforms.size();
+}
+
 // https://svgwg.org/svg2-draft/single-page.html#types-__svg__SVGNameList__getItem
 WebIDL::ExceptionOr<JS::NonnullGCPtr<SVGTransform>> SVGTransformList::get_item(WebIDL::UnsignedLong index)
 {
diff --git a/Userland/Libraries/LibWeb/SVG/SVGTransformList.h b/Userland/Libraries/LibWeb/SVG/SVGTransformList.h
index 34985803edd..a182a3b1b1c 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGTransformList.h
+++ b/Userland/Libraries/LibWeb/SVG/SVGTransformList.h
@@ -23,6 +23,7 @@ public:
     virtual ~SVGTransformList() override;
 
     WebIDL::UnsignedLong length();
+    WebIDL::UnsignedLong number_of_items();
 
     WebIDL::ExceptionOr<JS::NonnullGCPtr<SVGTransform>> get_item(WebIDL::UnsignedLong index);
 
diff --git a/Userland/Libraries/LibWeb/SVG/SVGTransformList.idl b/Userland/Libraries/LibWeb/SVG/SVGTransformList.idl
index 495ed4cbbb9..0b9ed0deb99 100644
--- a/Userland/Libraries/LibWeb/SVG/SVGTransformList.idl
+++ b/Userland/Libraries/LibWeb/SVG/SVGTransformList.idl
@@ -4,7 +4,7 @@
 [Exposed=Window]
 interface SVGTransformList {
   readonly attribute unsigned long length;
-  [FIXME] readonly attribute unsigned long numberOfItems;
+  readonly attribute unsigned long numberOfItems;
 
   [FIXME] undefined clear();
   // FIXME: SVGTransform initialize(SVGTransform newItem);