diff --git a/Userland/Libraries/LibWeb/FileAPI/Blob.cpp b/Userland/Libraries/LibWeb/FileAPI/Blob.cpp
index 056cddd3a6..b1f8a3d9f1 100644
--- a/Userland/Libraries/LibWeb/FileAPI/Blob.cpp
+++ b/Userland/Libraries/LibWeb/FileAPI/Blob.cpp
@@ -153,8 +153,6 @@ WebIDL::ExceptionOr<void> Blob::serialization_steps(HTML::SerializationRecord& r
 {
     auto& vm = this->vm();
 
-    TRY(HTML::serialize_string(vm, record, interface_name()));
-
     //  FIXME: 1. Set serialized.[[SnapshotState]] to value’s snapshot state.
 
     // NON-STANDARD: FileAPI spec doesn't specify that type should be serialized, although
diff --git a/Userland/Libraries/LibWeb/FileAPI/File.cpp b/Userland/Libraries/LibWeb/FileAPI/File.cpp
index db6e71d1a5..5e882789cf 100644
--- a/Userland/Libraries/LibWeb/FileAPI/File.cpp
+++ b/Userland/Libraries/LibWeb/FileAPI/File.cpp
@@ -91,8 +91,6 @@ WebIDL::ExceptionOr<void> File::serialization_steps(HTML::SerializationRecord& r
 {
     auto& vm = this->vm();
 
-    TRY(HTML::serialize_string(vm, record, interface_name()));
-
     // FIXME: 1. Set serialized.[[SnapshotState]] to value’s snapshot state.
 
     // NON-STANDARD: FileAPI spec doesn't specify that type should be serialized, although
diff --git a/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp b/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
index c0b2d6fc94..4e4307111a 100644
--- a/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
+++ b/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
@@ -306,6 +306,8 @@ public:
 
             m_serialized.append(ValueTag::SerializableObject);
 
+            TRY(serialize_string(m_vm, m_serialized, serializable.interface_name()));
+
             // 1. Perform the serialization steps for value's primary interface, given value, serialized, and forStorage.
             TRY(serializable.serialization_steps(m_serialized, m_for_storage));
         }