diff --git a/deps/ox/src/ox/std/uuid.hpp b/deps/ox/src/ox/std/uuid.hpp
index db743d6e..e4bafcb9 100644
--- a/deps/ox/src/ox/std/uuid.hpp
+++ b/deps/ox/src/ox/std/uuid.hpp
@@ -153,24 +153,23 @@ class UUID {
 					UUIDStr *out,
 					const Array<uint8_t, 16> &value,
 					std::size_t cnt,
-					unsigned valueI) {
+					unsigned &valueI) {
 				for (auto i = 0u; i < cnt; ++i) {
 					const auto v = value[valueI];
 					const auto h = detail::toHex(v);
 					oxIgnoreError(out->append(h.c_str(), h.len()));
 					++valueI;
 				}
-				return valueI;
 			};
-			valueI = printChars(&out, m_value, 4, valueI);
+			printChars(&out, m_value, 4, valueI);
 			out += "-";
-			valueI = printChars(&out, m_value, 2, valueI);
+			printChars(&out, m_value, 2, valueI);
 			out += "-";
-			valueI = printChars(&out, m_value, 2, valueI);
+			printChars(&out, m_value, 2, valueI);
 			out += "-";
-			valueI = printChars(&out, m_value, 2, valueI);
+			printChars(&out, m_value, 2, valueI);
 			out += "-";
-			valueI = printChars(&out, m_value, 6, valueI);
+			printChars(&out, m_value, 6, valueI);
 			return out;
 		}
 };