diff --git a/libsolidity/ast/Types.cpp b/libsolidity/ast/Types.cpp
index 7bcae812c..4ee5bfcf5 100644
--- a/libsolidity/ast/Types.cpp
+++ b/libsolidity/ast/Types.cpp
@@ -169,15 +169,6 @@ pair<u256, unsigned> const* StorageOffsets::offset(size_t _index) const
 		return nullptr;
 }
 
-MemberList& MemberList::operator=(MemberList&& _other)
-{
-	solAssert(&_other != this, "");
-
-	m_memberTypes = move(_other.m_memberTypes);
-	m_storageOffsets = move(_other.m_storageOffsets);
-	return *this;
-}
-
 void MemberList::combine(MemberList const & _other)
 {
 	m_memberTypes += _other.m_memberTypes;
diff --git a/libsolidity/ast/Types.h b/libsolidity/ast/Types.h
index 89b8f1700..09323d05a 100644
--- a/libsolidity/ast/Types.h
+++ b/libsolidity/ast/Types.h
@@ -95,9 +95,7 @@ public:
 
 	using MemberMap = std::vector<Member>;
 
-	MemberList() {}
 	explicit MemberList(MemberMap const& _members): m_memberTypes(_members) {}
-	MemberList& operator=(MemberList&& _other);
 	void combine(MemberList const& _other);
 	TypePointer memberType(std::string const& _name) const
 	{
@@ -132,6 +130,8 @@ private:
 	mutable std::unique_ptr<StorageOffsets> m_storageOffsets;
 };
 
+static_assert(std::is_nothrow_move_constructible<MemberList>::value, "MemberList should be noexcept move constructible");
+
 /**
  * Abstract base class that forms the root of the type hierarchy.
  */