diff --git a/AK/Endian.h b/AK/Endian.h
index e3636e6758..e0c6a9afa2 100644
--- a/AK/Endian.h
+++ b/AK/Endian.h
@@ -125,11 +125,21 @@ struct Traits<LittleEndian<T>> : public GenericTraits<LittleEndian<T>> {
     static constexpr bool is_trivially_serializable() { return Traits<T>::is_trivially_serializable(); }
 };
 
+template<typename T>
+struct Traits<LittleEndian<T> const> : public GenericTraits<LittleEndian<T> const> {
+    static constexpr bool is_trivially_serializable() { return Traits<T>::is_trivially_serializable(); }
+};
+
 template<typename T>
 struct Traits<BigEndian<T>> : public GenericTraits<BigEndian<T>> {
     static constexpr bool is_trivially_serializable() { return Traits<T>::is_trivially_serializable(); }
 };
 
+template<typename T>
+struct Traits<BigEndian<T> const> : public GenericTraits<BigEndian<T> const> {
+    static constexpr bool is_trivially_serializable() { return Traits<T>::is_trivially_serializable(); }
+};
+
 constexpr u16 bitswap(u16 v)
 {
     v = ((v >> 1) & 0x5555) | ((v & 0x5555) << 1);    // even & odd bits