diff --git a/Userland/Libraries/LibWeb/CSS/FontFaceSet.cpp b/Userland/Libraries/LibWeb/CSS/FontFaceSet.cpp
index cfd0dcafd5c..4e6ee21f5db 100644
--- a/Userland/Libraries/LibWeb/CSS/FontFaceSet.cpp
+++ b/Userland/Libraries/LibWeb/CSS/FontFaceSet.cpp
@@ -109,6 +109,18 @@ WebIDL::CallbackType* FontFaceSet::onloadingdone()
     return event_handler_attribute(HTML::EventNames::loadingdone);
 }
 
+// https://drafts.csswg.org/css-font-loading/#dom-fontfaceset-onloadingerror
+void FontFaceSet::set_onloadingerror(WebIDL::CallbackType* event_handler)
+{
+    set_event_handler_attribute(HTML::EventNames::loadingerror, event_handler);
+}
+
+// https://drafts.csswg.org/css-font-loading/#dom-fontfaceset-onloadingerror
+WebIDL::CallbackType* FontFaceSet::onloadingerror()
+{
+    return event_handler_attribute(HTML::EventNames::loadingerror);
+}
+
 // https://drafts.csswg.org/css-font-loading/#dom-fontfaceset-load
 JS::ThrowCompletionOr<JS::NonnullGCPtr<JS::Promise>> FontFaceSet::load(String const&, String const&)
 {
diff --git a/Userland/Libraries/LibWeb/CSS/FontFaceSet.h b/Userland/Libraries/LibWeb/CSS/FontFaceSet.h
index a4bc69a4734..0916c96e81d 100644
--- a/Userland/Libraries/LibWeb/CSS/FontFaceSet.h
+++ b/Userland/Libraries/LibWeb/CSS/FontFaceSet.h
@@ -35,6 +35,8 @@ public:
     WebIDL::CallbackType* onloading();
     void set_onloadingdone(WebIDL::CallbackType*);
     WebIDL::CallbackType* onloadingdone();
+    void set_onloadingerror(WebIDL::CallbackType*);
+    WebIDL::CallbackType* onloadingerror();
 
     JS::ThrowCompletionOr<JS::NonnullGCPtr<JS::Promise>> load(String const& font, String const& text);
 
diff --git a/Userland/Libraries/LibWeb/CSS/FontFaceSet.idl b/Userland/Libraries/LibWeb/CSS/FontFaceSet.idl
index 3633e81b948..817b9e6fe03 100644
--- a/Userland/Libraries/LibWeb/CSS/FontFaceSet.idl
+++ b/Userland/Libraries/LibWeb/CSS/FontFaceSet.idl
@@ -27,7 +27,7 @@ interface FontFaceSet : EventTarget {
     // events for when loading state changes
     attribute EventHandler onloading;
     attribute EventHandler onloadingdone;
-    [FIXME] attribute EventHandler onloadingerror;
+    attribute EventHandler onloadingerror;
 
     // check and start loads if appropriate
     // and fulfill promise when all loads complete
diff --git a/Userland/Libraries/LibWeb/HTML/EventNames.h b/Userland/Libraries/LibWeb/HTML/EventNames.h
index 83347232711..02990c52797 100644
--- a/Userland/Libraries/LibWeb/HTML/EventNames.h
+++ b/Userland/Libraries/LibWeb/HTML/EventNames.h
@@ -67,6 +67,7 @@ namespace Web::HTML::EventNames {
     __ENUMERATE_HTML_EVENT(loadedmetadata)           \
     __ENUMERATE_HTML_EVENT(loading)                  \
     __ENUMERATE_HTML_EVENT(loadingdone)              \
+    __ENUMERATE_HTML_EVENT(loadingerror)             \
     __ENUMERATE_HTML_EVENT(loadstart)                \
     __ENUMERATE_HTML_EVENT(message)                  \
     __ENUMERATE_HTML_EVENT(messageerror)             \