diff --git a/libs/util/include/psemek/util/flat_list.hpp b/libs/util/include/psemek/util/flat_list.hpp
index 8a0a4011..878fec9c 100644
--- a/libs/util/include/psemek/util/flat_list.hpp
+++ b/libs/util/include/psemek/util/flat_list.hpp
@@ -34,8 +34,17 @@ namespace psemek::util
 		std::size_t capacity() const { return capacity_; }
 		bool empty() const { return size_ == 0; }
 
-		T * data() { return nodes_.get(); }
-		T const * data() const { return nodes_.get(); }
+		T * data()
+		{
+			static_assert(sizeof(node) == sizeof(T));
+			return reinterpret_cast<T *>(nodes_.get());
+		}
+
+		T const * data() const
+		{
+			static_assert(sizeof(node) == sizeof(T));
+			return reinterpret_cast<T *>(nodes_.get());
+		}
 
 		void reserve(std::size_t size);
 		void clear();