diff --git a/Libraries/LibWeb/FileAPI/FileReader.cpp b/Libraries/LibWeb/FileAPI/FileReader.cpp
index d15fff3dd7..2390af4b41 100644
--- a/Libraries/LibWeb/FileAPI/FileReader.cpp
+++ b/Libraries/LibWeb/FileAPI/FileReader.cpp
@@ -51,6 +51,9 @@ void FileReader::visit_edges(JS::Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);
     visitor.visit(m_error);
+    m_result.visit(
+        [&](GC::Ref<JS::ArrayBuffer> const& array_buffer) { visitor.visit(array_buffer); },
+        [](auto&) {});
 }
 
 GC::Ref<FileReader> FileReader::create(JS::Realm& realm)
diff --git a/Libraries/LibWeb/FileAPI/FileReader.h b/Libraries/LibWeb/FileAPI/FileReader.h
index b5813cca54..c69cb67bea 100644
--- a/Libraries/LibWeb/FileAPI/FileReader.h
+++ b/Libraries/LibWeb/FileAPI/FileReader.h
@@ -21,7 +21,7 @@ class FileReader : public DOM::EventTarget {
     GC_DECLARE_ALLOCATOR(FileReader);
 
 public:
-    using Result = Variant<Empty, String, GC::Root<JS::ArrayBuffer>>;
+    using Result = Variant<Empty, String, GC::Ref<JS::ArrayBuffer>>;
 
     virtual ~FileReader() override;
 
diff --git a/Libraries/LibWeb/FileAPI/FileReaderSync.cpp b/Libraries/LibWeb/FileAPI/FileReaderSync.cpp
index 3ef486769e..4f291c9963 100644
--- a/Libraries/LibWeb/FileAPI/FileReaderSync.cpp
+++ b/Libraries/LibWeb/FileAPI/FileReaderSync.cpp
@@ -44,9 +44,9 @@ GC::Ref<FileReaderSync> FileReaderSync::construct_impl(JS::Realm& realm)
 }
 
 // https://w3c.github.io/FileAPI/#dfn-readAsArrayBufferSync
-WebIDL::ExceptionOr<GC::Root<JS::ArrayBuffer>> FileReaderSync::read_as_array_buffer(Blob& blob)
+WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> FileReaderSync::read_as_array_buffer(Blob& blob)
 {
-    return read_as<GC::Root<JS::ArrayBuffer>>(blob, FileReader::Type::ArrayBuffer);
+    return read_as<GC::Ref<JS::ArrayBuffer>>(blob, FileReader::Type::ArrayBuffer);
 }
 
 // https://w3c.github.io/FileAPI/#dfn-readAsBinaryStringSync
diff --git a/Libraries/LibWeb/FileAPI/FileReaderSync.h b/Libraries/LibWeb/FileAPI/FileReaderSync.h
index 79bb774428..acc4945638 100644
--- a/Libraries/LibWeb/FileAPI/FileReaderSync.h
+++ b/Libraries/LibWeb/FileAPI/FileReaderSync.h
@@ -24,7 +24,7 @@ public:
     [[nodiscard]] static GC::Ref<FileReaderSync> create(JS::Realm&);
     static GC::Ref<FileReaderSync> construct_impl(JS::Realm&);
 
-    WebIDL::ExceptionOr<GC::Root<JS::ArrayBuffer>> read_as_array_buffer(Blob&);
+    WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> read_as_array_buffer(Blob&);
     WebIDL::ExceptionOr<String> read_as_binary_string(Blob&);
     WebIDL::ExceptionOr<String> read_as_text(Blob&, Optional<String> const& encoding = {});
     WebIDL::ExceptionOr<String> read_as_data_url(Blob&);