diff --git a/include/rfl/TaggedUnion.hpp b/include/rfl/TaggedUnion.hpp
index 8df7267e..f1761ec2 100644
--- a/include/rfl/TaggedUnion.hpp
+++ b/include/rfl/TaggedUnion.hpp
@@ -17,6 +17,8 @@ struct TaggedUnion {
   /// The type of the underlying variant.
   using VariantType = rfl::Variant<Ts...>;
 
+  TaggedUnion() = default;
+
   TaggedUnion(const VariantType& _variant) : variant_(_variant) {}
 
   TaggedUnion(VariantType&& _variant) noexcept