diff --git a/sprout/uuid/udl.hpp b/sprout/uuid/udl.hpp
index 0d11c924..f8279a64 100644
--- a/sprout/uuid/udl.hpp
+++ b/sprout/uuid/udl.hpp
@@ -15,17 +15,17 @@ namespace sprout {
 			//
 			// _uuid
 			//
-			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(char const* s, std::size_t) {
-				return sprout::uuids::string_generator()(s);
+			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(char const* s, std::size_t size) {
+				return sprout::uuids::string_generator()(s, s + size);
 			}
-			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(wchar_t const* s, std::size_t) {
-				return sprout::uuids::string_generator()(s);
+			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(wchar_t const* s, std::size_t size) {
+				return sprout::uuids::string_generator()(s, s + size);
 			}
-			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(char16_t const* s, std::size_t) {
-				return sprout::uuids::string_generator()(s);
+			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(char16_t const* s, std::size_t size) {
+				return sprout::uuids::string_generator()(s, s + size);
 			}
-			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(char32_t const* s, std::size_t) {
-				return sprout::uuids::string_generator()(s);
+			SPROUT_CONSTEXPR sprout::uuids::uuid operator "" _uuid(char32_t const* s, std::size_t size) {
+				return sprout::uuids::string_generator()(s, s + size);
 			}
 		}	// namespace uuids