diff --git a/src/systems/si/include/units/si/units.h b/src/systems/si/include/units/si/units.h
index ee4fb0a8..cd4fcf65 100644
--- a/src/systems/si/include/units/si/units.h
+++ b/src/systems/si/include/units/si/units.h
@@ -91,7 +91,7 @@ inline constexpr struct electronvolt : named_unit<"eV", mag<ratio{1'602'176'634,
 namespace units {
 
 template<>
-inline constexpr bool unit_can_be_prefixed<si::degree_Celsius> = false;  // TODO Is it true?
+inline constexpr bool unit_can_be_prefixed<si::degree_Celsius> = false;
 template<>
 inline constexpr bool unit_can_be_prefixed<si::minute> = false;
 template<>