diff --git a/common/main/d_enumerate.h b/common/main/d_enumerate.h
index 53aebc5ea..9b4889058 100644
--- a/common/main/d_enumerate.h
+++ b/common/main/d_enumerate.h
@@ -60,7 +60,8 @@ template <typename sentinel_type>
 class enumerated_sentinel
 {
 public:
-	const sentinel_type m_sentinel;
+	sentinel_type m_sentinel;
+	constexpr enumerated_sentinel() = default;
 	constexpr enumerated_sentinel(sentinel_type &&iter) :
 		m_sentinel(std::move(iter))
 	{
@@ -106,6 +107,12 @@ public:
 			++ m_idx;
 		return *this;
 	}
+	enumerated_iterator operator++(int)
+	{
+		auto result = *this;
+		++ * this;
+		return result;
+	}
 	constexpr bool operator==(const enumerated_sentinel<sentinel_type> &i) const
 	{
 		return m_iter == i.m_sentinel;