diff --git a/src/2981R0_improving_our_safety_with_a_physical_quantities_and_units_library.md b/src/2981R0_improving_our_safety_with_a_physical_quantities_and_units_library.md
index 63762f1..74b77e4 100644
--- a/src/2981R0_improving_our_safety_with_a_physical_quantities_and_units_library.md
+++ b/src/2981R0_improving_our_safety_with_a_physical_quantities_and_units_library.md
@@ -341,7 +341,7 @@ In `std::chrono::duration`, the magnitude of a unit is always expressed with `st
not enough for a general-purpose physical units library. Some of the derived units have huge
or tiny ratios. The difference from the base units is so huge that it cannot be expressed with
`std::ratio`, which is implemented in terms of `std::intmax_t`. This makes it impossible to define
-units like electronvolt, (eV) where 1 eV = 1.602176634×10−19 J, or Dalton, where
+units like electronvolt (eV), where 1 eV = 1.602176634×10−19 J, or Dalton (Da), where
1 Da = 1.660539040(20)×10−27 kg. Moreover, some conversions, such as radian to a degree,
require a conversion factor based on an irrational number like pi.