diff --git a/deps/ox/src/ox/std/uuid.hpp b/deps/ox/src/ox/std/uuid.hpp
index 6a049e042..031222bef 100644
--- a/deps/ox/src/ox/std/uuid.hpp
+++ b/deps/ox/src/ox/std/uuid.hpp
@@ -145,6 +145,33 @@ class UUID {
 			return out;
 		}
 
+		[[nodiscard]]
+		constexpr ox::Error toString(Writer_c auto &writer) const noexcept {
+			auto valueI = 0u;
+			constexpr auto printChars = [](
+					Writer_c auto &writer,
+					const Array<uint8_t, 16> &value,
+					std::size_t cnt,
+					unsigned &valueI) {
+				for (auto i = 0u; i < cnt; ++i) {
+					const auto v = value[valueI];
+					const auto h = detail::toHex(v);
+					oxIgnoreError(writer.write(h.c_str(), h.len()));
+					++valueI;
+				}
+			};
+			printChars(writer, m_value, 4, valueI);
+			oxReturnError(writer.put('-'));
+			printChars(writer, m_value, 2, valueI);
+			oxReturnError(writer.put('-'));
+			printChars(writer, m_value, 2, valueI);
+			oxReturnError(writer.put('-'));
+			printChars(writer, m_value, 2, valueI);
+			oxReturnError(writer.put('-'));
+			printChars(writer, m_value, 6, valueI);
+			return {};
+		}
+
 		[[nodiscard]]
 		constexpr UUIDStr toString() const noexcept {
 			UUIDStr out;