diff --git a/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp b/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp
index c25ed61ff4..c56838e61e 100644
--- a/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp
+++ b/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp
@@ -64,6 +64,12 @@ MimeType::MimeType(String type, String subtype)
     VERIFY(!m_subtype.is_empty() && contains_only_http_token_code_points(m_subtype));
 }
 
+MimeType::MimeType(MimeType const& other) = default;
+MimeType& MimeType::operator=(MimeType const& other) = default;
+
+MimeType::MimeType(MimeType&& other) = default;
+MimeType& MimeType::operator=(MimeType&& other) = default;
+
 MimeType::~MimeType() = default;
 
 ErrorOr<MimeType> MimeType::create(String type, String subtype)
diff --git a/Userland/Libraries/LibWeb/MimeSniff/MimeType.h b/Userland/Libraries/LibWeb/MimeSniff/MimeType.h
index d85578842e..d914616a85 100644
--- a/Userland/Libraries/LibWeb/MimeSniff/MimeType.h
+++ b/Userland/Libraries/LibWeb/MimeSniff/MimeType.h
@@ -20,6 +20,12 @@ public:
     static ErrorOr<MimeType> create(String type, String subtype);
     static ErrorOr<Optional<MimeType>> parse(StringView);
 
+    MimeType(MimeType const&);
+    MimeType& operator=(MimeType const&);
+
+    MimeType(MimeType&&);
+    MimeType& operator=(MimeType&&);
+
     ~MimeType();
 
     String const& type() const { return m_type; }