diff --git a/src/Complex/arithmetic.ts b/src/Complex/arithmetic.ts
index 93d1559..0d403f4 100644
--- a/src/Complex/arithmetic.ts
+++ b/src/Complex/arithmetic.ts
@@ -82,9 +82,9 @@ export const sqrt =
        & Dependencies<'zero' | 'complex', T>
        & Dependencies<'absquare' | 're' | 'divideReal', Complex<T>>
        & {
-         addNumber: Signature<'addReal', T>, // TODO: should be possible to use Signature<'add'> here
+         addNumber: Signature<'addReal', T>, // TODO: should use Signature<'add'> here
          addReal: Signature<'add', RealType<T>>,
-         addComplex: Signature<'addReal', Complex<T>> // TODO: should be possible to use Signature<'add'> here
+         addComplex: Signature<'addReal', Complex<T>> // TODO: should use Signature<'add'> here
       }):
       Signature<'sqrt', Complex<T>> =>
    z => {