diff --git a/src/systems/include/mp-units/systems/si/units.h b/src/systems/include/mp-units/systems/si/units.h
index 8bb41b86..d69668a0 100644
--- a/src/systems/include/mp-units/systems/si/units.h
+++ b/src/systems/include/mp-units/systems/si/units.h
@@ -80,7 +80,7 @@ inline constexpr struct henry final : named_unit<"H", weber / ampere> {} henry;
 
 inline constexpr struct ice_point final : relative_point_origin<absolute<milli<kelvin>>(273'150)> {} ice_point;
 inline constexpr auto zeroth_degree_Celsius = ice_point;
-inline constexpr struct degree_Celsius final : named_unit<symbol_text{u8"°C", "`C"}, kelvin, zeroth_degree_Celsius> {} degree_Celsius;
+inline constexpr struct degree_Celsius final : named_unit<symbol_text{u8"℃", "`C"}, kelvin, zeroth_degree_Celsius> {} degree_Celsius;
 
 inline constexpr struct lumen final : named_unit<"lm", candela * steradian> {} lumen;
 inline constexpr struct lux final : named_unit<"lx", lumen / square(metre)> {} lux;
diff --git a/src/systems/include/mp-units/systems/usc.h b/src/systems/include/mp-units/systems/usc.h
index 49537f74..ec16c71f 100644
--- a/src/systems/include/mp-units/systems/usc.h
+++ b/src/systems/include/mp-units/systems/usc.h
@@ -119,7 +119,7 @@ inline constexpr struct inch_of_mercury final : named_unit<"inHg", mag_ratio<3'3
 
 // https://en.wikipedia.org/wiki/United_States_customary_units#Temperature
 inline constexpr struct zeroth_degree_Fahrenheit final : relative_point_origin<absolute<mag_ratio<5, 9> * si::degree_Celsius>(-32)> {} zeroth_degree_Fahrenheit;
-inline constexpr struct degree_Fahrenheit final : named_unit<symbol_text{u8"°F", "`F"}, mag_ratio<5, 9> * si::degree_Celsius, zeroth_degree_Fahrenheit> {} degree_Fahrenheit;
+inline constexpr struct degree_Fahrenheit final : named_unit<symbol_text{u8"℉", "`F"}, mag_ratio<5, 9> * si::degree_Celsius, zeroth_degree_Fahrenheit> {} degree_Fahrenheit;
 
 // clang-format on