diff --git a/documentation/proposals/Proposal - 3.0 Additional math types.md b/documentation/proposals/Proposal - 3.0 Additional math types.md
index 91ed4922e5..0490aeb1f8 100644
--- a/documentation/proposals/Proposal - 3.0 Additional math types.md	
+++ b/documentation/proposals/Proposal - 3.0 Additional math types.md	
@@ -41,6 +41,8 @@ public readonly struct Angle<T>
     , IMultiplyOperators<T, Angle<T>, Angle<T>>
     , IModulusOperators<Angle<T>, Angle<T>, Angle<T>>
     , ISubtractionOperators<Angle<T>,Angle<T>,Angle<T>>
+    , IParsable<Angle<T>>
+    , ISpanParsable<Angle<T>>
     where T : IFloatingPointIeee754<T>
 {